THE BENDER TWINS, PSI TWINS , REICHARD TWINS ALL FOR THE 750 DID NOT MAKE THE HP CLAIMED. THE 800 YAMAHA STOCK TWINS WAY WAY OUT PERFORM THESE PIPES ON THE 750. NOW IF THESE WERE DEALER INSTALLED, WHAT IN IT FOR CLUTCHING ?. IF YOU COME BACK AND SAY '' STOCK '' THAT WILL PROVE MY POINT. THAN I WILL TELL YA TO BUY THE 800 EXHAUST ERIC HAS FOR SALE HERE. 3:16 (yammie tony)