I was just thinking about the possibility of getting something else for the car but I am not sure what I should get. I have the mods in my sig plus the GM Stage 3 pulley. I was thinking about the GM manifold but was hoping for some feedback first as to how people liked it and the gains associated with it. I know its a little steep for a manifold but the warranty (5 year 60k) is really nice. I wouldn't mind getting the manifold and a downpipe but i don't know if I want to drop about 450 on the exhaust. If you guys could just give some suggestions maybe it would help me decide. Thanks a lot, appreciate it.

bump for the night

 

I would go with the gmpp manifold if you like your warranty, alot of people on here like it, and it yields good gains, throw in a d/p and you would have a nice little increase.

 

I was thinking about the manifold, CED has it for 250, not sure if there is shipping or not. I do not want to go down in pulley size at all so I don't think I will spend the money to get the dual pass. I think the blower now is pretty much at its peak efficiency, any lower and it is just going to get too warm and them I am going to have to drop $$ on cooling mods. I guess I really would just like to get the manifold and downpipe with a cat, not sure which brand I would want for the downpipe, and maybe something to help with some traction and that would probably be it for the car. Any other suggestions?

 

Get the 2.9 pulley and the manifold. I've got the 2.9 pulley and it pulls harder. It runs fine. No heating up here. I'm going to go with the hp tune to help it run smoother.

 

Those who have a aftermarket manifold/header and downpipe with cat combo, what type of performance gains could I expect if i got the GM honed manifold and a zzp 2.5" downpipe with cat? Anyone have this set up? I was wondering how the downpipe fits and holds up over time. Thanks a lot.

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