When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Couldn't help u on that... But i have a FMF PowerCore 4 pipe and it sounds good. Gave me good bottom end as will. If that helps u any. I thought the Q2 was pretty close to the powercore. But i've been wrong b4