I seek recommended replacement of stock pipes, recognizing I probably need a new carburetor jetting kit and larger air breather kit. The purpose is to have increased hp for carrying passenger, and I´ve already got the windshield, extra lights, passenger floor boards, back rest and carrier.I National Cycle -Cruise Liner bags cusomer painted to match the bike and need pipes to fit under the bags. The stock pipes are not an issue for fit up with the saddle bags.