manley chevrolet small block exhaust valve kit 1 625in head dia 5 036in o a length 0 3415in stem FeeBee fee The Edelbrock #61629 Performer RPM

The Edelbrock #61629 Performer RPM head is perfect for street performance

Clevite Ford 159 2

Theyre inherently unstable and there are countless YouTube videos of users getting injured from a rogue handle or getting their hands caught between the handle and the body of the jack

By replicating the OE spun body design

Designed to deliver trouble-free

manley chevrolet small block exhaust valve kit 1 625in head dia 5 036in o a length 0 3415in stem FeeBee fee The Edelbrock #61629 Performer RPMManley 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