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Select from flange-head for each bolt size
2017-2021 Ski-Doo MX Z TNT E-TEC 850
1997-1998 Honda TRX300FW FourTrax 4x4
2019 Ski-Doo Renegade X ACE 900 Turbo
2003-2004 Honda TRX350TM FourTrax Rancher
Starting Line Products 14-118 Exhaust Valve Springs - White tools-engine Select from flange-head for eachLoad 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.
