Earl's Oil Filter Adapter - Bypass - 3/4-16 Center Thread - 1/2 in NPT Female Inlet - 1/2 in NPT Female Outlet - 2-3/4 in O-Ring - Black 4101XXSBK The internal arch support is

The internal arch support is not found in many motorsports shoes but greatly increses the comfort when wearing for an extended period

1978-1982 Ford Fairmont

GM LS-Series to Big Block Chevy

3/8 in NPT Female to 3/8 in NPT Female

Adjustable Rpm Range And Displays In Imperial Or Metric Measurements

Earl's Oil Filter Adapter - Bypass - 3/4-16 Center Thread - 1/2 in NPT Female Inlet - 1/2 in NPT Female Outlet - 2-3/4 in O-Ring - Black 4101XXSBK The internal arch support isEarl's Billet Aluminum Oil Filter By Pass Adapter 1178 Spin On Oil Filter Bypass Adapter Aluminum Natural 3 4 16" Thread 1 2" NPT Inlet OutletEngine Oil Filter Adapter Quick and Easy To Install Product Description: Oil Filter Adapter Bypass 3 4 16 Center Thread 1 2 in NPT Female Inlet 1 2 in NPT Female Outlet 2 3 4 in O Ring Aluminum Black Anodized Sold Individually Earl's Performance Products was founded by Earl Fouts in 1955 in Lawndale, California.