manley chevrolet small block exhaust valve kit 1 625in head dia 5 021in o a length 0 3415in stem Tandwielsets The housing incorporates factory air

The housing incorporates factory air scoop inlets

linker cilinderkop

40 Pounds Condition New Fitment Type Direct Replacement Manufacturer Mopar SKU 5013815AA

Crafted from durable 3/16” steel

0135647674

manley chevrolet small block exhaust valve kit 1 625in head dia 5 021in o a length 0 3415in stem Tandwielsets The housing incorporates factory airManley 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