Valve Springs POLINI 300 cc

4 pcs.
Product description
The use of a ‘hot’ camshaft extends the inlet timing on four stroke motors. They should always be fitted in combination with stiffer valve springs to ensure they close properly. The additional use of gas-flowed valves and larger valve
discs provides an enormous increase in performance from the cylinder. POLINI have made a complete motor valve upgrade kit available, manufactured to their usual high quality. A ‘must-have’ item for all four stroke performance freaks!
OEM numbers (for comparisons):
228.0132 (POLINI)