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Performance Cast Iron cylinder heads are designed to be a direct replacement for your worn or cracked heads
leading to valve seat damage and early valve grind
These Speedmaster filters are washable and reusable
Will not directly plug into GM column but can be connected by individually connecting wires from harness to their respective circuits
They feature less than
4.530" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 Performance Cast Iron cylinder headsThese 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.
