my cat rattles like crazy, and i'm fed up with it. i would like to put a custom straight pipe in its place. i have a slightly mod'd 350. also, it has a 3" cat-back.

would putting a staight pipe in be a good or bad thing. any comments on torque, hp, sound, etc.

 

I had dual cats and removed them for straight pipes. I would recommend it to anyone, especially if you have an adjustable fuel pressure regulator so you can raise it a little bit. If your engine is tuned right for it you won't lose any torque or horsepower (I can feel a debate coming on about now). Just make sure you do it right with no leaks, and be pleased with the deeper exhaust note!

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1990 IROC 350
Mods: Too busy trying to make it run right to mod it.
Airfoil, Dynomax cat-back, Accel coil, 180 t-stat, Bald Eagle tires,
Hypertech fan switch, Accel 23# injectors, Holley AFPR, ported plenum,
Ruger P95DC, hot wife, new oil filter, thick rubber floormats, no cats.
18.0 @ 85MPH since I'm one big-a$$ MF
"It's better to have and not need than to need and not have."