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double adjustable shocks
The CNC coiling head can adjust the spring diameter in real time to ensure that every spring is exactly the same
taking only about an hour and requiring no drilling
This design gives you a strong control arm that eliminates deflection and greatly improves performance
Made in the USA
Manley Valve - Exhaust, Valve-S/D 1.600,+.500 ford f150 double adjustable shocksManley 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
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