just thought i would let u guys know that i installed my stainless steel 4-1 type r header on my gsr yesterday. a friend and i did it up at work (lexus dealership) and we put it up on a lift. so it does fit, just had to loosen part of the hydraulic clutch in the front where it was bumping up against. thanks to the person who showed me the pic of the a-pipes. but i can feel a difference and it screams when the secondaries open. and chirps into 2nd are dirty even w/ my rims on. j/ thought i would share. it feels good to install something on your own.