True duals or y-pipe 1in 2 out?
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Joined: Aug 2012
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From: Kentucky
Car: 1988 iroc-Z 5.7l TPI
Engine: 5.7l TPI
Transmission: 700R4
Axle/Gears: 3.73
True duals or y-pipe 1in 2 out?
I know theres a issue with installing duals on a third gen due to clearance issues.. but as of right now my car has a perfectly good 3" flowmaster cat-back exhaust (headers, ypipe, 1 in 2 out) but its just to quiet for me... and i cant help but think that its robbing me of a few hp..... other than sound would upgradeing to "true duals" help HP at all?
Joined: Dec 2005
Posts: 6,499
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From: Macon, GA
Car: 1992 Camaro RS
Engine: Vortec headed 355, xe262
Transmission: T56
Axle/Gears: 9-bolt 3.70
Re: True duals or y-pipe 1in 2 out?
Run a magnaflow. Do you have headers? Flowmasters were plenty loud on my L03 TBI car, but it had a gutted cat so that might have something to do with it.
Just dont do anything silly like straight piping it.
Just dont do anything silly like straight piping it.
Thread Starter
Junior Member
Joined: Aug 2012
Posts: 49
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From: Kentucky
Car: 1988 iroc-Z 5.7l TPI
Engine: 5.7l TPI
Transmission: 700R4
Axle/Gears: 3.73
Re: True duals or y-pipe 1in 2 out?
Thats a good point infernalVortex.. straight pipeing is bad. yes my car has headers (not sure what brand but there shortys). Thanks!
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From: M.D
Car: 1987 Camaro
Engine: 350 hsr
Transmission: 700R4(blown)
Axle/Gears: 3:73
Re: True duals or y-pipe 1in 2 out?
You always can go with an electric cut out , loud is not always a good thing...
Also true dials adds a lot of extra weight and with a good 3" system will do just as good
Also true dials adds a lot of extra weight and with a good 3" system will do just as good
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From: williamstown,NJ
Car: 95 9C1,99 Sierra,90Sierra,00 sierra
Engine: TBI350,LM7,LT1,Vortec 350
Transmission: 700r4,4L60e,4L60e,4L80e
Axle/Gears: 10 bolt,14bolt,3:42,3:73,3:08,3:73.
Thread Starter
Junior Member
Joined: Aug 2012
Posts: 49
Likes: 0
From: Kentucky
Car: 1988 iroc-Z 5.7l TPI
Engine: 5.7l TPI
Transmission: 700R4
Axle/Gears: 3.73
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Thread Starter
Junior Member
Joined: Aug 2012
Posts: 49
Likes: 0
From: Kentucky
Car: 1988 iroc-Z 5.7l TPI
Engine: 5.7l TPI
Transmission: 700R4
Axle/Gears: 3.73
Re: True duals or y-pipe 1in 2 out?
Thanks for your input, bud. i was told a few diffrent things... like the y-pipe 3" catback is just as good as true duals performance wise. then i was told the opposite.
Joined: Dec 2005
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From: St. Cloud, MN
Car: 1984 Trans Am
Engine: LS1383 in work
Transmission: Magnum F - to be installed
Axle/Gears: Zexel Torsen 3.73, 28-spline mosers
Re: True duals or y-pipe 1in 2 out?
IIRC, the 3" single piple flows around 5cfm less than a true dual set up with 2.5" pipes. The difference is maybe 1hp.
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