Just FYI.. The Borla exhasut for the IS-F is out. I just saw it on their website for $899.99. It's not a true dual exhaust but the muffler's have quad outlets.:(

Here is a link for those who want to look and don't feel like searching :cool: I wonder what the performance gains are. They're probably similar to Tenabe's version of the same type of exhaust (rear section).

http://www.borla.com/applications/lookup.aspx/2008/Lexus/IS+F/Stainless_Steel_Rear_Section/11765/

I was just checking out the web site and there is another version listed w/o tips off road for $1299.99. Click the link and scroll down to Lexus part #12656

http://www.borla.com/products/new_products.aspx

anyone know what the reported gains are on these? bad thing about the off-road... passing smog...

anyone know what the reported gains are on these? bad thing about the off-road... passing smog...

The gains are not listed.

anyone know what the reported gains are on these? bad thing about the off-road... passing smog...

Isn't it the same with the JoeZ exhaust system, in terms of passing smog?

Isn't it the same with the JoeZ exhaust system, in terms of passing smog?

Yup same thing in terms of smog.

Also noticed on the Borla site (http://www.borla.com/products/product_detail.aspx?prod_sku=12656) some updated information and the exhaust is slightly different than those we have seen thus far. The borla mufflers have dual outlets on each to match up with the exhaust diffusers in the bumper, they use a single resonator vs two separate ones and the x pipe looks pretty beefy.

Here in CA, no cats equates to failing visual smog inspection.

Cayman, I like how this Borla looks, esp the tips matching up...is anyone gonna try this thing?...wonder how loud it is as well....the comments on Borla quality have me nervous...I thought they were known for their quality :confused:

The Borla webpage also has a link to an installation PDF file for the IS F which includes some photos of their exhaust. I prefer the flanges on the Joe Z exhaust over the muffler clamps on the Borla but it does appear to keep the cost down. Unfortunately, Borla doesn't list the diameter (I'll assume 2.5" by the clamp size listed) or weight of the exhaust. It's good to see another manufacturer acknowledging our cars existence!

I wonder if they are using their XR-1 mufflers...if they are, expect some good HP gains and sound!

I wonder if they are using their XR-1 mufflers...if they are, expect some good HP gains and sound!

You should get the exhaust so I can hear it. :p

Actually, I might!!!

Actually, I might!!!

That would be sweet. I'd be interested to hear the difference between that and the PTS JoeZ exhaust I have on the way.

That would be sweet. I'd be interested to hear the difference between that and the PTS JoeZ exhaust I have on the way.

+1 for the difference between the two


Was anyone ever able to get sound clips or dyno information from Borla or a third party (preferred)?

Just from my past experience with Borla systems, they are usually not that loud, definitely lighter than stock and sounds sweet. With their full off road system, from their drawing it looks like they are using dual pipes and I really wonder how it will sound with just the resonator & no mufflers.

Pkrockt let us know if you get a Borla, I'd like to hear more about it before I get my hands on one. The off-road interests me.

By the way, what do you have in your STi? I am the dealer for ECUTEK Philippines, and we've managed to squeeze 314WHP out of an 08 STI using ONLY 3" exhaust and downpipe, Pipercross drop in filters and a lot of hours in re-mapping. No internal mods.

On my STI, I have a semi built motor, stock cams, TurboXS's GT30R .82 hotside kit, all supporting mods, running only 19psi and tuned somewhat conservatively by Jermaine at TurboXS. It's a road course car which is why I did not go bigger (GT35R+). It's no doubt a lot of fun to drive.

Back to the ISF...With K&N just releasing their Typhoon intake, I may just get the Borla system along with it. I've used K&N's products on all my cars for over 18 years and no complaints. Stay tuned...

Geat set up on the Scooby,certainly not overdone for what it delivers.

Hello All,
This is Chris Higgins w/Borla Performance Industries in Oxnard, CA. I thought I would hop in & answer a few questions about our systems. We do have our tips positioned & welded to the mufflers to correspond to the fascia tip exit points used by Lexus. While I wasn't able to find our dyno results, but I do have our flowbench test results. Also, I've included the weights of our exhaust systems.

Rear Section (aka Axel-Back) p#11765

Street Legal
Bolts up to the factory 3" flange and splits into dual 2.5" tubing
Weighs 30lbs
Flowbench Test - Flows 236 more cubic inches of water than stock


True Dual Cat-Back p#12656

Race System - NOT Street Legal
Dual 2.5" tubing all the way from factory flanges
Weighs 54lbs
Flowbench Test - Flows 366 more cubic inches of water than stock


Thanks for your interest in our product & let me know if you have any other technical questions!:D

Chris Higgins
Borla Performance Industries
chrish@borla.com
Direct 805-246-6000
Toll-Free 877-GO-BORLA

Awesome, thanks for the technical post Chris.

Chris,

Speaking for virtually all of us, thanks for jumping in this forum and clarifying any confusion. Can you give us some data on the sound/decibels of your off road system?

Thanks,

Thanks for joining and helping us understand more about your system Chris. I would really like to see some of the dyno results if you find them :cool:

True Dual Cat-Back p#12656

Race System - NOT Street Legal
Dual 2.5" tubing all the way from factory flanges
Weighs 54lbs
Flowbench Test - Flows 366 more cubic inches of water than stock




Thanks for the post Chirs, but I think we're all waiting on a dyno.

For anyone with the information, how does the diameter and weight compare to the joez exhaust?

Thanks for the post Chirs, but I think we're all waiting on a dyno.

For anyone with the information, how does the diameter and weight compare to the joez exhaust?

The JoeZ exhaust is 64lbs. Borla is claiming 54lbs.

So we know what the price and weight difference is. We still have to find out the difference in gain. Any idea?

Anyone buy the Borla exhaust yet?

Interesting... I hope someone picks it up soon to compare it with the JoeZ

I'd like to see a review of the exhaust and also a pre and post install dyno.

FYI

Horse Power Freaks has it for $1,213.63 DELIVERED.

http://www.horsepowerfreaks.com/performanceparts/Lexus/IS-F/Exhaust/Exhaust_Systems

;)

FYI

Horse Power Freaks has it for $1,213.63 DELIVERED.

http://www.horsepowerfreaks.com/performanceparts/Lexus/IS-F/Exhaust/Exhaust_Systems

;)

I gave up on them with their lack of dyno backups and questionable workmanship claimed by others - I ordered the Joe Z exhaust...

The intake, for $140, for only 5 ponies and no major sound difference - I'll pass on that for right now...

So has anyone actually installed one yet? Is it quieter than the Joe Z exhaust? Dyno numbers?

Chris,

Speaking for virtually all of us, thanks for jumping in this forum and clarifying any confusion. Can you give us some data on the sound/decibels of your off road system?

Thanks,

We don't have dB ratings on either of these systems. The rear section is a little louder than stock at idle and significantly noticeable at WOT. The off-road system will of course be more aggressive than the street legal rear section all-around.

Thanks for joining and helping us understand more about your system Chris. I would really like to see some of the dyno results if you find them :cool:

I am still not able to find the dyno results; we welcome a thrid-party dyno testing. Also, someone asked about the tubing size we use. The rear section comes from one 2.75" pipe into dual 2.5". The off-road system is dual 2.5" all the way back.

Thanks again for your interest in our product,
Chris

I ordered the Borla offroad system today for my IS-F, the stainless catback plus Xpipe. I live in West Palm Beach, FL and there is a company in Boynton Beach called 21st
Century Exhaust that has it, they are a wholesaler. Got it for $920 and it will take about 7 days to get here........i will keep you posted.

I ordered the Borla offroad system today for my IS-F, the stainless catback plus Xpipe. I live in West Palm Beach, FL and there is a company in Boynton Beach called 21st
Century Exhaust that has it, they are a wholesaler. Got it for $920 and it will take about 7 days to get here........i will keep you posted.

Very cool. You planning to do a before and after dyno?

That's cheap! Tell us how you like it once installed. I'm curious.

Sure thing, i will keep you up to date..............and yes, i will probably stick it on the dyno when finished. :)

Sure thing, i will keep you up to date..............and yes, i will probably stick it on the dyno when finished. :)

So you don't plan to do a before/after dyno?

I also ordered the Borla axle-back system, I had it done a bit differently. Pipes will not be polished (am not a fan of bling) and mufflers and tips will be powder coated dark grey.

I should get it in a few weeks cause it'll have to be shipped.Keep you posted when it comes.

I also ordered the Borla axle-back system, I had it done a bit differently. Pipes will not be polished (am not a fan of bling) and mufflers and tips will be powder coated dark grey.

Both Borla systems utilize the stock F tips. I'm confused by your statement by your above statement concerning the tips:confused:

Lou

after much debate I also just ordered the Borla axle back system. Felt the Joe Z created a little to much interior noise for my taste although it does sound terrific! Will keep everone posted with pics and vid.

sounds good, keep us updated! thanks, tell us how it goes goodluck

Geneva, you have the Joe Z now and just purchased the Borla? I would really like to hear what you think about the differences. I love the Joe Z but it would be good for others to hear

the borla axle back system is just a completely different system than the joez. for comparison purposes, you would need to do the for street use only borla system... i am curious to see what the axle back system sounds like tho.

Both Borla systems utilize the stock F tips. I'm confused by your statement by your above statement concerning the tips:confused:

Lou

I'm referring to the tips coming out of the mufflers, not the oval ones mounted on the rear garnish.

I do not have the JoeZ but had a chance to do a ride along and hear first hand from outside drive-by to interior at various speeds. Spoke with Chris at Borla and he convinced me the axle back should be what I'm looking for. Ordered from Speedfreaks and expected ship date is 5/18. Will keep everyone updated with progress and results.

Spoke with Chris at Borla and he convinced me the axle back should be what I'm looking for. Ordered from Speedfreaks and expected ship date is 5/18. Will keep everyone updated with progress and results.

What arguments did Chris use to persuade you to go with the axle back system? It has always been my belief that a V type engine should be equipped with a well designed dual exhaust with an H or an X pipe. It is my opinion that this is critical on a V8, V10 or a V12. I don't understand why Lexus designed their "semi-dual" two into one into two exhaust system. The axle back maintains this configuration, but frees up some of the back pressure with lower restriction mufflers and a better flowing rear Y.

Lou

Guys,

I installed the Borla Cat-back exhaust system plus x-pipe today, the offroad version. I was thinking at first, oh damn what did i do and thought it would be rediculously loud but no.......and DAAYYYYUUUMMMM does it sounds good. Pretty sure that Borla installed my own personal cheerleaders in the pipes. It sounds deep and throaty. I stuck my car on the dyno before stock today and it produce 344rwhp and 318 torque, after it produced 354rwhp and 326 on torque, it was a hot day down here though and not much airflow. I forgot the printouts for the dyno but will pick them up early on in the week when i go back to get the k&n system installed.

finally an independent dyno on the borla off-road system. doesn't compare in gains to the joe-z system tho as the borla system added about 10hp compared to 22hp on the joe-z. maybe if the conditions were better, you would have seen better than the 10hp gains....

i'd be really curious to see what the k&n does. you should do a pre and post install dyno on the k&n also

I would really like to see the results Mateo. Thanks for posting up that you installed it and had it dyno'd and I'm glad to hear you like it. Interesting you only got 10hp off the system, what were/are they claiming out of curiosity? Weather could have played a small role in the gains

Guys,

I installed the Borla Cat-back exhaust system plus x-pipe today, the offroad version. I was thinking at first, oh damn what did i do and thought it would be rediculously loud but no.......and DAAYYYYUUUMMMM does it sounds good. Pretty sure that Borla installed my own personal cheerleaders in the pipes. It sounds deep and throaty. I stuck my car on the dyno before stock today and it produce 344rwhp and 318 torque, after it produced 354rwhp and 326 on torque, it was a hot day down here though and not much airflow. I forgot the printouts for the dyno but will pick them up early on in the week when i go back to get the k&n system installed.
I'd love to hear how it sounds. Can you do a video? Thanks.

Were these SAE corrected results!? I can't believe it only gave you 10hp considering it's almost identical to the PTS JoeZ series. 2.5" tubing, x pipe, high flow mufflers etc. Something doesn't sound right. Also not sure how many runs you did on the dyno buy typically the 3rd and 4th consecutive run will yield the highest numbers. So if you took your highest baseline and compared to only your first run with the new exhaust I could then see where you only showed a 10hp gain. Hell my first run on the dyno with the new exhaust showed only 3hp gain, but by the 3rd and 4th runs I was at the 20 hp gained mark.

finally an independent dyno on the borla off-road system. doesn't compare in gains to the joe-z system tho as the borla system added about 10hp compared to 22hp on the joe-z. maybe if the conditions were better, you would have seen better than the 10hp gains....

i'd be really curious to see what the k&n does. you should do a pre and post install dyno on the k&n also

well i will run the dyno again after i install the k&n since we already know what it runs after the Borla it won't be hard to figure out. I am not sure however what Borla was claiming. I was showing a very low air-fuel ratio, anyone else had problems with this? Not usre on the numbers exactly, will get them when i go back Monday.

Were these SAE corrected results!? I can't believe it only gave you 10hp considering it's almost identical to the PTS JoeZ series. 2.5" tubing, x pipe, high flow mufflers etc. Something doesn't sound right. Also not sure how many runs you did on the dyno buy typically the 3rd and 4th consecutive run will yield the highest numbers. So if you took your highest baseline and compared to only your first run with the new exhaust I could then see where you only showed a 10hp gain. Hell my first run on the dyno with the new exhaust showed only 3hp gain, but by the 3rd and 4th runs I was at the 20 hp gained mark.

Funny that you say that because i actually pulled 10hp the first time, the second was less. Like i said, it was very hot and humid today here in south
florida and they had fans blowing from the front but not enough to do anything, not sure if this could have made a difference.

well i will run the dyno again after i install the k&n since we already know what it runs after the Borla it won't be hard to figure out. I am not sure however what Borla was claiming. I was showing a very low air-fuel ratio, anyone else had problems with this? Not usre on the numbers exactly, will get them when i go back Monday.

i was saying run the dyno before and after the k&n install just because your numbers with the borla seem a little bit low... if you compare to those numbers, it might inflate the true gains with the k&n. would be nice to get a new "base" before the install.

i was saying run the dyno before and after the k&n install just because your numbers with the borla seem a little bit low... if you compare to those numbers, it might inflate the true gains with the k&n. would be nice to get a new "base" before the install.

True, will do.

when can we hear the exhaust. I want to hear before I jump to buy. I dont want to get stuck with a ricer sound. want more of a v8 deep sound

keep us posted Mateo

when can we hear the exhaust. I want to hear before I jump to buy. I dont want to get stuck with a ricer sound. want more of a v8 deep sound

Everyone recommends getting the Joe-Z exhaust because majority are saying that it makes the car sound like a real muscle car v-8. BTW what do you mean ricer sound?

Everyone recommends getting the Joe-Z exhaust because majority are saying that it makes the car sound like a real muscle car v-8. BTW what do you mean ricer sound?

Very True indeed

any updates on the dyno and a clip of the sound

Sounds like the Borla made about the same hp ratings as what I made with the Joe Z exhaust on Dyno Dynamics. I made 11 rwhp and 10 lbs tq from the exhaust. I probabely would of hit a higher reading if I let my car have some cool down time though but realistically for a NA car 10-12hp gain from just an exhaust is more realistic compared to the dynojet readings of 20-22 whp from the Joe Z that everyone dyno'd. Anyhow still good gains. Better then no gains.

I probabely would of hit a higher reading if I let my car have some cool down time though but realistically for a NA car 10-12hp gain from just an exhaust is more realistic compared to the dynojet readings of 20-22 whp from the Joe Z that everyone dyno'd. Anyhow still good gains. Better then no gains.

Andy,

Just to add a quick note...
Realistically the many independent DynoJet tests across the US all speak for themselves..

The 20-22 rwhp gains from the PTS exhaust are what you are expected to gain to the wheels, when measured on the DynoJet system.

More about DynoJet company.. (http://www.dynojet.com/about_us/default.aspx)

Regards,

Joe Z :)

anyone have a sound clip

OK guys just installed the Borla axle back and it's everything I had hoped for!! Fit and finish are excellent (per photos), system at idle has very deep rich tone and slightly louder than stock but much deeper sound quality. At steady cruise again nice mellow tone but more pronounced than stock. At heavy to WOT WOW!! it really barks but again with a classic big block V8 sound quality. I know I know "sound vids please"!! Trying to get something better than cell phone so will do my best. This system in IMO has really added a new personality to the car. I haven't turned the radio on since I had it installed! As a side note, although I didn't actually weigh the stock vs. borla, from carrying each around my estimate is @ 20 lb. weight savings. The stock system is a "boat anchor"! If your priority for an exhaust is primarily sound with some increase in HP (@ 10-12) this is it!!!http://s705.photobucket.com/albums/ww51/genevaISF/http://i705.photobucket.com/albums/ww51/genevaISF/timscar037.jpg
http://i705.photobucket.com/albums/ww51/genevaISF/timscar039.jpg
http://i705.photobucket.com/albums/ww51/genevaISF/timscar040.jpg
http://i705.photobucket.com/albums/ww51/genevaISF/timscar041.jpg
http://i705.photobucket.com/albums/ww51/genevaISF/timscar036.jpg

Glad to hear that, Geneva. Mine's on a boat now finding it's way here. I also got the axle back but powder coated my mufflers with flat black and asked them not to polish the pipes. I now have the JoeZ intake, Tom's filter, FSport rear stabs, and the Borla. Getting there...

I wish I had that much space in my garage. Thanks for the post it great to see it broken out.
Fig

Very nice! Thanks for sharing some pics and honest feedback!

thanks for the positive response guys and for those interested we did a side by side comparison video of the borla axle back vs. the Joe-Z. Post can be found on Club Lexus website, IS-F forum. The Post is by DRE1615 under "Exhaust Symphony". Not the best sound quality but still kind of cool. Will be updating with better video source and maybe add some in car side by side performance runs.

Hey Joe is the PTS system MIG or TIG welded? That is the only thing I see that could have been a bit better is the weld appearance.
I am going to be playing with tone modifiers for my rear section this weekend and hopefully have my Ti proto done next week.

Fig

Hey Joe is the PTS system MIG or TIG welded? That is the only thing I see that could have been a bit better is the weld appearance.
I am going to be playing with tone modifiers for my rear section this weekend and hopefully have my Ti proto done next week.

Fig

Hey Mike..

We fully TIG weld (http://www.clublexus.com/gallery/data//4537/IMG_1001.jpg) the entire system.. :cool:

Joe Z

^^^ Thanks, I thought that was the case....now that is a weld worth paying for ;)

Hey guys, it has taken a while for me to get around to this sorry.......but here is a quick clip of the Borla i through on the F. http://www.youtube.com/watch?v=4D_vyPZz-Ic

I put the K&N system on last week as well and damn does it sound fierce. Im going to put a couple videos up this week of some drive by's so check it out. People freak when i roar by them now!!

Hey guys, it has taken a while for me to get around to this sorry.......but here is a quick clip of the Borla i through on the F. http://www.youtube.com/watch?v=4D_vyPZz-Ic (http://www.youtube.com/watch?v=4D_vyPZz-Ic)

Damn, that does sound good. I just ordered one up myself. Thanks for posting!

Hey guys, it has taken a while for me to get around to this sorry.......but here is a quick clip of the Borla i through on the F. http://www.youtube.com/watch?v=4D_vyPZz-Ic (http://www.youtube.com/watch?v=4D_vyPZz-Ic)

I like your rims too. What size rubber do you have on those? Any mods to accomodate those?

Also, did you see the oem rims? If so, how much did you get for them, if I may ask?

Thanks.

I like your rims too. What size rubber do you have on those? Any mods to accomodate those?

Also, did you see the oem rims? If so, how much did you get for them, if I may ask?

Thanks.

they are 20x9.5 in the front and 20x11 in the rear, got them from 360forged.com out of miami, check them out, they have great wheels. I kept my stock rims though. I am trying to get a couple more video's when it quits raining down here to post.

The Borla sounds kind of raspy, where are the JoeZ sounds very throaty. I have the JoeZ and like the JoeZ better...yeah, I'm a little biased :D

The Borla sounds kind of raspy, where are the JoeZ sounds very throaty. I have the JoeZ and like the JoeZ better...yeah, I'm a little biased :D

Understandable, but at least give me a chance to post the drive by pics!! Its sounds raspy while sitting still but very deep while driving, im not a hater, i like the Joe Z as well. :D

Understandable, but at least give me a chance to post the drive by pics!! Its sounds raspy while sitting still but very deep while driving, im not a hater, i like the Joe Z as well. :D

hey mateo what are the offsets and do they rub at all?

Any imdependent dynos?

to be honest, im not sure on the offsets..........but no rubbing whatsoever.

WoW... love the sound of the borla, i think is louder than Joe Z, is it ? Hope to see more video of the exhaust.