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Improved shoulder protection
2017-2021 Ski-Doo MX Z TNT E-TEC 850
Select from flange-head for each bolt size
2016-2019 Husqvarna FC450
Choices create champions
Starting Line Products 14-118 Exhaust Valve Springs - White tools-engine Improved shoulder protectionLoad at . 63in. 2. 8lbs. Load at 1in. 1. 6lbs. 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.
