I want to get the GMMG exhaust with the SLP 1-3/4 headers then get the MAC performance Y-pipe from Hawks. Then I will just put a 2-1/2 inch pipe cause I wont be running a cat. What do you guys think?

 

Sounds perfect GMMG exhaust is the best

 

I too want to get the gmmg as soon as spring comes hopefully I'll have enough money for it......I hope

 

1-3/4" primary headers with 2-1/2" I-pipe sounds like a recipe for down-stream flow restriction.

If you only need a 2-1/2" I-pipe, you don't need 1-3/4" primaries.

 

I agree. For a regular street 350, 1 5/8" is ideal. Especially with our low revving TPI intake

 

The MAC Y-pipes are nice. But the two 2 1/2" pipes "Y" into a 3" pipe("collector" to the cat), so you'd want to run a 3" pipe in place of the cat, not a 2 1/2" pipe. MAC sells this pipe on their website(though it would prolly be less expensive to have a shop cut and flare a 3" pipe for you). And the GMMG exhaust is a 3" exhaust system anyway.

But also before you buy, you should know that the two MAC Y-pipe choices only fit their specific applications: the stock replacement Y-pipe(that Hawks sells) only lines up to fit the stock manifolds; the header Y-pipe only lines up to MAC's own headers(and comes with their headers).

I suppose it might be possible to get one of their Y-pipes to work on other applications by doing some custom modification/fabrication.

Another choice is buying headers that come with their own Y-pipe. Many do... like MAC's, Hooker, and I thought SLP did... but maybe not(anymore).

 

Yeah I noticed the size of the MAC ypipe after I posted and also that the SLP comes with its own y pipe. So ignore the y Pipe idea. And also ignore the 2-1/2 I pipe. I wasnt thinking right the day I wrote this. It will be a 3 inch I pipe for place of the cat.

So it will be the SLP headers and Y-pipe with the 3 inch I pipe for the place of the cat and the GMMG 3 inch exhaust.

 

sounds like a great combo...its just gonna cost boatloads of cash haha

 

Yeah thats why I have to wait until October after my boot camp and tech school and use part of my sign up bonus for it. Wont cost me even a quarter of my sign up bonus.