I have been looking up videos/sounds of exhaust systems like Joe Z, Royal Muff, Borla, etc and ran across a video of a DIY muffler delete. I gotta admit, the muffler delete sounds pretty amazing...and it's next to free am i right?
lets put it this way, how much are you lookin to spend? if you do the muffler delete should be inexpensive, if you have money the exhaust cost more then 1k or even 2k. depending on what setup ur gettin. my vote is for aftermarket due the the headers available and after hearing them with joe z exhaust. its unbelievable. i still haven't heard one with headers with the muffler delete yet. i was in the same situation at one point. but then an opportunity to buy a used joe z exhaust came and im jumped the gun. never look back since. good luck deciding!
I'd go w/ muffler and secondary cat delete and save the money to buy headers! Here's why.
Less than $100
Sounds amazing (not sure about the rasp but it does sound exotic up top)
Added power (Dyno'd 362rwhp) Stock dyno's between 330-350
Lost weight (Approx. 38lbs)
Don't have to wait for shipping
Does drone around 2k rpm but this is the same in an aftermarket system (including joe z's to an extent)
Not as pretty if you looking underneath the car (can't tell either way standing or driving behind it)
To revert to stock you have to pay the $100 to re-weld the system back together compared to just bolting the stock system back on.
Either way you can't go wrong. Both ways will get the car to sound like a V8 should. Just depends what you wanna spend your money on.
I think ISS Forged is around $2500. If you are talking about Royal Muffler in CA, then I think you have to take your car in for them to custom make the exhaust to fit your IS-F. I don't think they have them readily available to ship.