Yea thats true, it would "feel" faster, it wouldnt really be faster by much at all.
You may get an extra 15-20hp at the fly? so might bring it back to around the power of what it was stock, but it will sound faster :y:
Also a stock jdm rwd exhaust manifold mixed with a 2" system would be heaps decent enough for most 4ages up to 200hp according to Bill Sherwood, so it would easy suffice for a extremely mild one. you might call that a "cheap" upgrade because you don't need expensive extractors.
Travis.