I finally installed my cam Sunday well now I want to do longtubes ASAP. Well I have chosen to do calspeed 1 3/4 stainless, my question is how would that sound through a stock 2011 Gm muffler. Cam specs or 212/218 112

 

why would you wanna run the stock muffler? There are aftermarket mufflers that flow way better than the factory POS and are still fairly quite..

 

I wouldn't run the stock muffler if you are doing all the trouble with putting headers on.

Get something like a Spintech sportsman 3000XL muffler, it is a free flowing muffler and is not going to be overly loud.



Or you could try a Long Case Magnaflow muffler.

 

I wanted to run stock to keep it pretty quiet. That's all but ill look into the spintexh