old system:
3" custom straight pipe w/ no cat convter... very loud but a nice low tone no can of bees sound at all. it worked wonders but my car lagged in the low RPMs but once i was moving it was on. i got alot of gains from it... would have been better if i had a turbo piping was too wide

new system:
2.5" custom piping w/ megaflow muffler (wanted different muffer bug got it for free) still no cat convter. my exhaust was lower sounding but still very loud during normal driving and louder during VTEC. my lower RPM had better response without giving up too much power when compared to other system