I've had my tein springs for a while now and have decided to install it this weekend on my 2008 ISF since it's getting warm in NJ...only thing is I lost the bumper cutting guide. Can you guys provide me where to cut bumper at for the front and rears? Great help is appreciated!...what are your thoughts on installing just the fronts? The rear stock drop is perfect...would ride quality be even better with both rear and fronts or same if just the fronts were installed.

haha primo gas was 2.76 when this post started

i had tein suspension on my last bmw. they were good for 1 year and then i was feeling the road more and more. i dont recommand.

I have TEINs installed on just the front. It PERFECTLY levels out the car and greatly enhances the appearance. The ride I feel at worst is the same, but most of the time I feel that it's better than stock. Only 2 problems with lowering the car. PROBLEM #1- is that it changes the camber of the wheels soo that the top of the tires are in towards the car more than they should be. I just wore through a new pair of Continental ExtremeContact DW front tires in 8 months with 6/32 tread left in the middle but completely worn through on the inside edge of both tires. The drivers side actually wore completely through and I had a flat on the side of the highway. I just bought 2 new front tires and I needed a solution. They don't make a camber kit for the ISF however, you can get you a set of SBC adjustable ball joints designed specifically for Lexus ISx vehicles, that allow you to adjust camber. You can pick up 2 of these for around $215 or less shipped. PROBLEM #2- it wears your front struts/shocks out much faster than the stock height bc it makes them travel much more. I am hearing both sides popping now and I will have to replace those now also. I hope all that helps.

it help in aerodynamic and increasing in stability of the car or ?