I'm considering purchasing a used SP2 and was wondering if everyone could lend their opinion. I'm having a tough time finding sound clips of it on a G35, but have found many for it on a 350z. In terms of sound, performance gains (if any) etc, how do you feel this exhaust compares?

 

It's just a muffler, you're not gonna make or lose any power. Sounds ok, though.

 

How much louder than stock will the SP2 sounds? Is it a signifigant difference?

 

I don't think you can compare any Greddy exhaust to the 3 most popular systems here on Driver. Either in sound, quality and fitment HKS, Stillen and F1 are dual cat-back systems and far better than Greddy anything....my opinion.
Gary

 

Thanks Gary. On that note, I've been reading around on the HKS close like the XO2. What are these supposed to be like. The threads I have read have seemed favorable. Also, do you know what the cost of installing a full cat back exhaust would be?