i dunno
but i know HKS have their private test course and spend millions in R&D. also backed by the best after sales customer service.

and why are u buying a MADE IN JAPAN car when all u care is USA crap? go drive a domestic troll

 

Oh, so USA is crap. Go live in Japan if it's that great. Seriously, American's make great products and so do the Japanese. Everyone claims to make great hp gains but it's always questionable. If all is equal, I would rather back American workers than foreign. That's the way it should be.

Vodkarocket - You might want to consider starting small by just replacing the muffler. The stock muffler has a built in valve which adds backpressure at low rpm's for more torque. If you put the Magnaflow on and don't feel any power loss, then you can consider doing the rest of the exhaust. If not, you can put the stock muffler back on and sell the Magnaflow. Just a thought.