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About Starting Line Products Exhaust Valve Springs

Starting Line Products Exhaust Valve Springs

  • Polaris exhaust valves open with cylinder pressure.
  • As you go up in elevation, cylinder pressures are reduced causing exhaust valves to open later than they should or in some cases not at all.
  • This can cause poor and inconsistent top end horsepower.
  • Changing to lighter exhaust valve springs allows the exhaust valves to open at the proper time maintaining proper top end horsepower and running consistency.
  • Order 2 per engine.

Warning:  California Proposition 65

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