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2009-2010 Sea-Doo (Boats) 230 Challenger SP (310 hp)
Designed for Stock Tires
1985-1993 Arctic Cat Pantera
2013-2015 Honda NCH50 Metropolitan
Manley Performance 11675-8 MAN Severe Duty Valves shop-mixing-cups 2009-2010 Sea-Doo (Boats) 230 ChallengerManley Severe Duty Valves deliver the ultimate in strength, reliability, and high performance durability. Engineered for extreme gasoline engine temperatures, these valves are crafted from exclusive materials (XH 428 for exhaust and NK 844 for intake), offering unmatched tensile strength compared to competitive alloys. In fatigue testing at 40,000 psi and 1400F, Manley exhaust valves endured 100 million cycles, while competitors failed after just
