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help with custom gmmg
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Posted by: ddot

I want to make my own gmmg can someone help me out with the size piping to the I pipe , the bends and the y I should use.

I plan on using sweet thunder 18" 2 1/2 in out mufflers, with slp dual 2 1/2 tips.

Going on 1998 formula sl1.

Posted by: tim99ws6

i assume you have seen pics of them right...?
first you want a flowmaster 3" inch in 2 1/2" outs and put that right after the pipe comes over the axle. 90* bend the pipes toward the driver side, using one sweet thunder pipe on one. then turn another 90* bend on the one w/ the sweet thunder in it. the other one needs a 180* bend heading back to the passenger side and have a sweet thunder pipe thereafter. at the appropriate time, 90* bend it out the exhaust on the other side, and there you go!!!

hop that helped...at least that is how i TTHINK it's been done....seem pretty easy to accomplish...Good luck, and let me know how it works out!

Tim

Posted by: ddot

thanks .

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