I've heard that switching to dual cats can really open a 305 TPI up quiet a bit. Is this true? Has anyone ever done this? Would you recommend that I do it, or it'll be a waste of time and money. I'm trying to decide whatever or not to get a cat-back system now or switch to dual cats if they open up more power. Thanks in advance.

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1989 IROC-Z Convertible
305 TPI automatic
White with black top
Mods:
None to date... Working on it!!!
My webpage: http://mindspring.com/~humvee

you could try just getting a single 3" hi flo cat and could probably do that and get a cat back for about the same price as going to dual cats

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90 IROC 5.7l (L98)
ram air, K&N's, air foil,Flows

LIKE A ROC

Waste of money. A good 3" cat and catback flow plenty to support 300+hp, and that's about as much streetable HP as you can get out of an N/A 305.

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91 Trans Am WS6
Bright White
5.0 TPI auto
Flowmaster 3" 2 chamber catback
Trans Go shiftkit
2000 stall converter

Built on Wednesday