I Bought a 3 inch flowmaster kit for my car when it still had the 305 in it. Its a 3 inck setup with a 2.5 inch exit, I'm confused why they didn't just make the whole thing 3 inch. Now that I had edelbrock TES, and a 3inch cat I'm wondering if this 2.5 inch exhaust is causing a noticeable restriction. About the only thing this tailpipe is good for is the sleeper look, but the lopey idle and hoodscoop kind of offset it now. I figure it'll cost me about a hundred dollars to get a 3 inch flowmaster muffler and tailpipe and I want to know if you guys think it'll be worth it

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91 RS W/carbed 350, Vortec heads, performer rpm, Comp cams Xtreme energy 268 grind. BFG Drag radials. 3.42 posi,Corvette servoed 700r4, ****ty stock converter
13.24@104

 

I say get away from flowmaster, i've heard better reports of other cat-back systems liked dynomax and hooker aero chamer mufflers. I myself felt a reduction in HP when i installed my flowmaster cat-back. Maybe someone else would like to elaborate on this.

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89 IROC-Z 350 TPI

-Flowmaster Catback
-Performance Resource Chip
-Rebuilt 700R4 Tranny
With the goodies to go

-K&N Airfilters
-Ported Plenum
-2.77 Gears (not much to brag about but eh, its there)

 

Vortecfcar, I am moving this to the exhaust forum to see if you can get more feedback there.