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Speedmaster's velocity stacks are chrome plated with a steel mesh top
They utilize an open element design
Fits big block Chevy rectangular port cylinder heads on standard deck blocks
Store and protect your differentials the easy way with our Speedmaster horizontal differential storage cases
1966-72 (1973 non-CA) passenger cars
4.290" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 Speedmaster's velocity stacks are chromeThese Speedmaster piston oil ring spacers are used in applications where the piston oil ring groove intersects the pinhole. Speedmaster piston oil ring spacers are manufactured from spring steel and install against the bottom sill of the oil ring groove. Available in different bore diameters to suit your specific engine's needs, the Speedmaster piston oil ring spacers will keep your pistons working smoothly throughout the entire operating range.
