Thinking about gmpp manifold

[sfwg]

zzp

 

[YelloEye]

If you buy a pair...you have issues....there is only 1 exhaust manifold on a 4-cyl motor.

 

[09balt]

I meant 1 lol dont worry

 

[cobalt123]

Get either vibrant or zzp

 

[09balt]

A friend of mine that has an supercharged ss told me to go with zzp. So whats the big deal about extruded honed manifolds?

 

[Cobalt Tom]

te gmpp manifold just doesnt give you the flow. an aftermarket header will do what your looking for
I have the OTTP longtube and love it.

 

[09balt]

So basically with the gmpp header did they just bore out the ports to make it bigger and for more gas to exit from it?

 

[YelloEye]

Here is what they do: Abrasive flow machining - Wikipedia, the free encyclopedia

 

[09balt]

Now i see

 

[sfwg]

just get a zzp and b happy dont get ottp they suck at shipping stuff o btw ne on wanna buy a ottp hardcore bar?