4.290" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 They utilize an open element

They utilize an open element design

Speedmaster has already done the work for you

Speedmaster's velocity stacks are chrome plated with a steel mesh top

for the Ford Coyote (2015-2020)

4.290" Bore Piston Oil Ring Rail Spacer Support (0.030" Thick) Set of 8 They utilize an open elementThese 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.