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Stef's Lifter Valley Vents 7220

from $24.95
These anodized aluminum lifter valley vents for small block Chevy's offer positive crank case ventilation to the upper engine. Eliminates lifter valley oil drain-through to the crankshaft and resultant increases in wind-age and also eliminates debris...

Stef's Oil Restrictors

from $16.95
Stef's stainless thread in Oil Restrictors with inverted hex are a necessity for late Bowtie blocks, Rocket Olds, Merlins, and BBC because they install flush with the back of the block. These restrictors reduce the lifter/rocket arm oil supply to a .060"...