Mack, I can only speak to the Basanni Power Curve I put on my RKC and to what my well-respected tuner told me. I am very pleased with my 88" stage one setup - Doherty air cleaner with power vents, Basanni power curve true duals with Hooker tuned flow mufflers and SERT. I got good HP - 71.25 and great torque - 86.57. The tuner told me that hehas gottenbetter numbers with Basanni duals than with other dualsand does not get a dip in torque in the lower rpms. He also told me that the 86.57 is the best torque that he has ever gotten with any stage one 88 that is stock other the intake and exhaust. With all that said, he highly recommends D&D Fat Cats if you want the best performing exhaust.

 

If you like the looks of the power curve (and I do) I think they are the best pipes going..............

 

I had a set of the Power Curve head pipes and the Bassani touring muffs on my last RKC. They were great. Nice and mellow at idle and steady cruising, yet they had a unique bark to them at full throttle.