GMPP exhaust manifold?
Senior Member
Joined: 09-08-06
Posts: 3,511
Likes: 2
From: *
I had the GMPP Exh Mani installed when I bought the car so I never knew what the difference was...
The GMPP intake is nice -- best looking IMO...but it's not the best for performance unless you get rid of the base...it's restrictive to incoming air...
The GMPP intake is nice -- best looking IMO...but it's not the best for performance unless you get rid of the base...it's restrictive to incoming air...
New Member
Joined: 12-28-08
Posts: 46
Likes: 0
From: Dallas TX
DO NOT! buy that pos gmpp manifold. I bought mine with the gmpp cat-back and damn......a waste of money.
1.Heavy
2.Pointless
3.Dont buy it thinking your gonna save your warrenty just get a header n wrap it.
1.Heavy
2.Pointless
3.Dont buy it thinking your gonna save your warrenty just get a header n wrap it.
Member
Joined: 08-10-08
Posts: 352
Likes: 0
From: Montreal, Canada
I felt a slight difference at 3500 RPM's
it's the stocker, polished and slightly ported
someone dynoed a 6whp gain on a SS/SC with the GMPP catback installed already
so I would say around 3-4 whp for you
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