How much hp does the GMP header give the 2.2 cobalt?

 

no clue.... i have a stock ss/sc manifold for sale if your interested in that

 

Probably not enough to justify buying one.

Get a stock LSJ manifold and stock LSJ dp and you will be set. And it is much cheaper.

Here is a comparision.


LSJ Manifold on the left and L61 manifold on the right


L61 dp on the left LSJ dp on the right.

 

6 Whp and 4 wtq on a SS/SC. This was only word of mouth by a friend back in AZ, who tested 4 or 5 different exhaust manifolds/headers.

Each test was done about 1 hour apart on the same day.

He didn't like any of the aftermarket headers (even GMPP), since they all net the same hp and usually less torque so he ended up making his own header that made 7whp and 6wtq.