is that a true 5" or 4" down 5" out?

 

Most are 4" downpipe to 5". I don't see how you can fit a 5" downpipe between the engine and the frame. I could barely fit my 4" and I have about a 4 mm gap on each side.

 

ya thats y im asking

 

i dont see a turbo upgrade in his sig. so im thinkin its a 4in downpipe

 

bigger exhaust is really only for sound until u really need the extra breathing room. But trust me, going from stock exhaust to a 4" + really deepens the tone, i went from stock to 4" to 6" tip and it's like a deep rumble now, before it was raspy and piercing, now it's just LOUD and deep.