I have a 91rs 305 5spd, car and was wondering your opinions on cat-back systems.

American thunder 3"
American thunder 2.5"
force II 3"

those are the three im looking at, give me our opinions

 

in your case i would recommend the 3" american thunder catback. i think the sound of my force II system is pretty much perfect, but you probably wouldnt get the same results on your 305. the force II may be too quiet with a stock motor and a cat for you. basically heres the rundown....american thunder catback is louder, and has 2 tailpipes out the back. force II is quieter with 1 tailpipe out the back, but flows a tad better. with your setup though, there wouldnt be any difference in performance. either way you go, im sure itll sound great. you made a good decision with flowmaster.

 

What about the SLP exhaust? I think that one is stainless, right? I am not sure if the others are but I had heard good things about the SLP one. On my Iroc I had the Edelbrock and it sounded great and I picked up some good tenths at the track but it was not stainless so a little surface rust began to show after a while.

 

the flowmaster catbacks are aluminized steel, and will last a long time. the slp catbacks are very expensive, and do they make them for 3rd gens or just 4th?