manley chevy ls 1 ls 2 small block 1 575 pro flo severe duty exhaust valves set of 8 Trackbar and will significantly increase the

and will significantly increase the on and off-road performance of the RAM 2500 when driven aggressively

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manley chevy ls 1 ls 2 small block 1 575 pro flo severe duty exhaust valves set of 8 Trackbar and will significantly increase theManley 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