Start with a Polini bottom end, and you will be able to get the most out of your performance setup. This matches perfectly the PGT Polini top end we sell. Includes a stronger spring to keep your variating in check.
Includes: Gaskets Case Halves 2 case Bolts 15mm Intake 19mm Intake 4 petal reed block
You can use your stock crank, or upgrade that as well.