I have heard that when you have a single exhaust pipe you get better flow when you have only a single outlet on the muffler instead of dual. Is this true??

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Later,
Vomex
'89 GTA 5.7L TPI

 

depends on the muffler design. I'm sure there are some single in out muffler that flow better than single in dual out and vice versa. Its a lot uglier than a dual out version so most people won't do it.

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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....

To be installed eventually far far far into the future: Yours if the price is right and I don't have to ship :
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
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[This message has been edited by Tas (edited September 23, 2001).]

 

the reason they say that is because on the ones that exit on both sides at the rear, (such as flowmaster 80 series) one of the tips routes exhaust so that it has to turn 180* while the other goes straight out.

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- David
88' GTA 5.7L TPI MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT, Flowmaster 80 Series

 

When I originally started modifying my GTA I had this same question so I called Flowmaster. The tech I talked to said, and I quote, "Cross flow mufflers suck". Needless to say, I went with the Force II kit.

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92Z28
89GTA

 

ya the only reason im using cross flow it cause i like the look of dual 3.5" chrome tips. one of these days when i get more performance parts on, i'll put the two on the left muffler back on.

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- David
88' GTA 5.7L TPI MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT, Flowmaster 80 Series

 

Ya that is most likely the case so I plan on doing True duals 1 in 1 out x 2 =

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1989 Trans Am GTA, L98 5.7L TPI, TH700-R4, T-Tops, dual cats, 9-bolt rear, 3.27,
- K&N Air Filter
- Dynomax muffler

1992 Camaro RS, LO3 5.0L TBI, T-5, T-Tops, 3.08, L69 Dual Snorkel - Sold
- K&N Air Filter

Honda engines ROCK, I have one on my lawn mower but I still have to push it.

 

I've also heard that with dual outs, obviously 1 out is on the same side as the "in" and typically the "in" pipe has to be smaller in that situation.

 

' Course you could go with a 1 in/ 2 out straight-through design like the one's from SLP and Borla. But both tips will still be on the same side.