The CPI, Keeway and Generic models are factory-fitted with a restrictor. The restriction is mostly through the exhaust manifold. Our version allows for the full power of the engine to be tapped. We recommend using a 10% larger main jet M6 and lighter variator weights 15x12mm. Performance manifolds are available in either black or chrome. Suitable for all Euro 2 models with 3-point silencer fitment.