I think it's also worth mentioning that for best results after changing your exhaust parts out, following up with a tune for the parts installed will yield the best results.
Experience on other platforms leads me to believe that 3" is the way to go for big power:cheers:. If I were to go full bolt-ons , or run meth injection, e85, or portfuel I'd go 3". If my end goal was to have a fun daily driver, I'd go 2.5".
Seen this happen in the DSM/Evo world and the testing revealed that looks were the main focus. Overall, the parts work, but it's best to support the companies that support the community. Ebay turbochargers, intercoolers, SS exhaust parts that later rust because of their inferior quality, and...
Might as well do it right the first time and buy something that's been developed to remove heat efficiently pull after pull and fit close to stock. Chinese made parts look good, but are often lacking in R&D:(.
F/I is different than N/A. A good 2.5"-3" cb w/ as few bends as possible will show an increase in hp over the stock exhaust. The MAPerformance exhaust would be a nice upgrade.