Starting Line Products 14-118 Exhaust Valve Springs - White electrical-turn-signals-components-wiring Second generation controller with improved

Second generation controller with improved remote range

2015 Polaris Sportsman 850

2015 Harley Davidson XG500 Street 500

2003-2007 Arctic Cat 400 4x4

1998 Ducati 900 Sport

Starting Line Products 14-118 Exhaust Valve Springs - White electrical-turn-signals-components-wiring Second generation controller with improvedLoad 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.