say the test pipes added 25 horsepower. thats roughly $14 for 1 hp. not bad, seeing that the intake on a na is bout $100 and only adds like 2-3 rwhp (why am i thinking this number? or was it one of them made 2-3 rwhp more than a different brand? wahtever, deff not $14 per horsepower). much better power per dollar ratio