I'm considering about purchasing a down pipe for my 2011 g37s 6MT. What would be a good brand and model for it? I was thinking about buying a cat back, but I like the stock exhaust. Could you guys recommend some down pipes? Thanks!

 

Are you referring to the Y-Pipe or possibly test pipes that remove catalytic converters? Downpipes are used on turbo'd cars.

 

Your vehicle doesn't come with downpipes. Are you talking about headers or possibly adding a test pipe/HFC system?

-Frank

 

I meant adding a test pipe. I'm thinking CNT resonated test pipe. would that be a good thought?