What do I need yo make a 4in exhaust with out a CAT. Everything stock on exhaust now. Like what headers, Ypipe, and mufflers? Or would a 3in be better?

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92 Camaro 305 TBI. Everything stock so far except a shift kit.

Future mods. Spark plug wires and plugs, tint, Cutting off cat and new 3inch pipes. Maybe putting 2 glass paks for effect. any other advise on getting to 300+ HP would be appreciated. Thanks

 

you definately don't need a 4" exaust for a 305 TBI

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-Tas
'89 Formula WS-6

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

Soon to be installed:
Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.

Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz

 

Any reasons why.. And what would be the pros/cons of a 3in compared to a 4 in? Also what would be a good setup without a cat on a 3in then?

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92 Camaro 305 TBI. Everything stock so far except a shift kit.

Future mods. Spark plug wires and plugs, tint, Cutting off cat and new 3or 4inch pipes. Maybe putting 2 glass paks for effect. any other advise on getting to 300+ HP would be appreciated. Thanks

 

because you're not flowing nearly enough air to warrant it.

 

for our 305 TBI's, you don't need anything near a 4" pipe...hell, a full 3" system is large for ours (without a cat). If you go with too big of a pipe, then you end up losing too much torque, which will actually make your car less powerful.

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'92 Firebird 305 TBI
3.73 Posi
ASCD Ram Air Hood
14X3 K&N
'00 WS6 Exhaust
'00 16x8 Wheels

http://www.geocities.com/birdv8