i have hks hi-power on my 94 ls w/ headers. before the headers the exhaust was real deep and i got comments about it sounding like a carbon-ti on a wrx. but after i installed the headers the sound did become greater, but between the 2-4k rpm range it was still really deep yet when u get into your 5-6k rpm (also greatest torque range for the b18b1) it was loud but not like a weed wacker.....FYI: the HKS hi-power is a little bit pricey though, i purchased mine for $630, the best price online for the hi-power is probably at www.adventon.com , also the exhaust is not as big as an apex n1, but it does have straighter overall piping then the n1. hope this helps, but dont make your decision on wat other ppl say, just get wat u like.