You can always run a poor mans b pipe(stock kawi 650 pipe dried out and lengthened 3 inches),Coffman sizzler, or pjs 3 piece kawi 650 pipe. Or a FPP 650 b pipe if you can find one. Downfall is you will need a FPP exhaust manifold to run these pipes!
What will you run for a water box? I’m doing...