Cody - I heard raidentech was good, they just rarely have parts in stock. But they have decent prices and shipping. I got one of those neighbors too! [:@]
DSB - You CANNOT run an open header system. The tuned pipe not only harmonically balances pressure waves to the engine, it supplies pressure to the fuel tank to force fuel into the carb. No pipe means no fuel and your engine won't run very long without it, unless you can figure out a way to pressurize the fuel tank, without the pipe. These engines sound awesome with just the header though!