Thinking about gmpp manifold

YelloEye

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

09balt

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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

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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

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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?
 

sfwg

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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?
 

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