I have hedman headers with a custom 2 1/2 inch Y pipe on each side which connect to a 3? inch main pipe that leads to my two chamber flowmaster which exits with two 2 1/2inch pipes. Is this an adequate exhaust for my application? Or can I do something better?

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Bright red 87 GTA with I have stock 3.27 gears,stock converter,B&M shift kit, TRW forged 9.75:1 pistons,comp cams pushrods, edelbrock valvesprings, 462 camel hump heads with 2.02in/1.60ex redrilled for angled plugs, 3 angle valve job, ported and polished, performer RPM intake, mallory fp regulator, edelbrock 750 CFM carb, hei ignition(new) with 10,000 volt coil,No cat, flowmaster 2 chamber mufflers, hedman full length headers, edelbrock cam with 488/501

 

Hmm, well maybe u could get a bigger Y-pipe with a 3" collector at the bottom and are u sure the exaust cat-back is a 3" system? Cause how does a 2.5" collector fit onto a 3" cat-back? Anyways, if u have a 2.5" cat-back u need to upgrade it to either a 3" at least of a 4" but no higher than that.

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Eric Natzke
91 Firebird 305 TBI
"It Ain't Stock"
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