manley chevy ls 1 ls 2 small block 1 575 pro flo severe duty exhaust valves set of 8 Trackbar Een berg stof en een

Een berg stof en een laboratorium van een half miljoen dollar

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They also feature tapered runners for increased flow at high rpm

manley chevy ls 1 ls 2 small block 1 575 pro flo severe duty exhaust valves set of 8 Trackbar Een berg stof en eenManley 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