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Old 03-05-2006   #1
longtrackrmk
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Join Date: Mar 2006
Posts: 45


stock Y pipe is a joke

Just changed the stock manifolds to headers and cut the stock Y pipe apart and found that GM was trying to see how much back presure they could get with it, worst possible design for flow they could have made. If you are puting on headers or any mod, FIX that Y pipe what a piece of (*%&) I bet just puting a high flow Y pipe on a stock car would show high HP gains on the dyno!!!!!!!!!
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Old 03-05-2006   #2
nblanchard
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Location: North York, ON Canada (Toronto)
Posts: 870


Re: stock Y pipe is a joke

No doubt... in fact, SLP used to sell a Y-pipe replacement that bolts up to stock manifolds... I was going to buy it, but they don't have it anymore. When I had my 3" stainless welded to the y-pipe, the guy noticed the pipe coming down from the passengers side downpipe sticking down half way in to the crossover tube coming from the drivers side.. so he cut it all out with a plasma cutter.
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Best Track Time is 14.396 @ 95.71MPH

225.5hp @ 4250rpm (at the wheels)
325.8ft-lbs @ 3250rpm (at the wheels)
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Old 03-05-2006   #3
twobirds
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Join Date: May 2004
Location: Thornton,Co
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Re: stock Y pipe is a joke

Yep the stock y-pipe is crap. That is why mine has been gone for along time.
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Old 03-05-2006   #4
Fred91GTA
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Location: Brooklyn, NYC
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Re: stock Y pipe is a joke

The whole stock exhaust is a joke. About the only thing that the stck manifolds are good for are to make homemade twin turbo headers. And then, you'd still need to get rid of the stock Y-pipe.
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Old 03-05-2006   #5
nblanchard
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Re: stock Y pipe is a joke

When I get the money for headers.. i was thinking the manifolds would make good tire stops.... no?
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Best Track Time is 14.396 @ 95.71MPH

225.5hp @ 4250rpm (at the wheels)
325.8ft-lbs @ 3250rpm (at the wheels)
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