If your running some forced induction then I would say yes, but your not going to see any real gains in low end performance. It will just make the exhaust less restrictive, which on helps out at really high RPMs. So this is why xbajbusx says that it felt slower. You gain more hp, but lose torque in the end. Do you plan on running at 6 thousand rpms all the time or 2 to 4 grand.