Well im tired of the custom cai i made the one that everybody makes of 3inch pcv w the cone k&n filter. I think im gonna upgrade to the slp one for 90-92 firebirds i heard that it will fit the 3.1 too. Reason i dont like the custom one is that it doesnt make that bad *** noise that most cai make it is no louder then the stock intake. I guess that its because the ones that make the loud scream are the ones with the air boxes and without the air boxes that make that effect then it should be quite?
if anybody wants to buy the custom cai w/ k&n filter pm me. nothing is wrong with the custom cai route its just i want that bad *** noise.

 

It wont fit... Different TB sizes...

 

caz the slp kit doesnt bolt to the throttle body it bolts the the air duct that clamps.