Improved Racing’s GM LS-series oil cooler adapter’s slim design was developed to provide more header clearance than any other adapter on the market. The mounting holes are counter-bored so the mounting bolts fit flush with the adapter surface, and the included Viton rubber and aluminum gasket is recessed into the adapter for maximum clearance with a reliable seal. The adapter features two 1/8 NPT ports for sensors or a turbo oil supply line. It is machined from a single piece of billet 6061-T6 aluminum and is black anodized. The adapter features standard female -8AN O-ring boss ports. Anodized adapter fittings in your choice of -8AN, -10AN or -12AN lines available separately. Can be mounted upside down on the 5th generation Camaro / G8 oil pan for additional header clearance. Old part number EGM-1006. 100% bolt-on in place of the factory oil bypass cover, just above the oil filter. Low-profile design provides more header clearance than any other oil cooler adapter on the market. Clears most long tube headers, including the JTR and Spoolin Performance headers in RX-7 LS engine swaps. Two 1/8 NPT ports for sensors or turbo oil feed line. Retains stock oil filter location. Oil exiting the adapter is filtered oil. 6061-T6 billet aluminum construction with black MIL-A-8625 Type II anodized finish. Made in the USA. Dimensions are shown in inches. 8AN, -10AN, or -12AN adapter fittings available separately. 1x Low-profile oil cooler adapter block. 1x Aluminum oil cooler gasket with Viton seals. 2x Stainless steel mounting screws. 2x 1/8 NPT plugs with thread sealant. Note: This oil adapter is designed for O-ring boss fittings with a straight thread length of 0.500 or less. We recommend using our fittings in order to guarantee proper fitment and seal. Corvette motor mounts: We recommend using a 90-degree AN fitting on the top port and a 90-degree AN fitting on the front (angled) port to connect the oil lines to this adapter. F-Body motor mounts: We recommend using a 90-degree AN fitting on the top port and a 60-degree AN fitting on the front (angled) port to connect the oil lines to this adapter. Gen IV LS Engines: On some engines, the knock sensor is located above the oil cooler adapter. You may need to loosen and rotate the knock sensor slightly, and unbolt and move the knock sensor wiring harness out of the way to clear the oil lines. All 1997 and later GM LS family engines (Gen III & IV) with rear-sump oil pans including LS1/LS6, LS2, LS3, LS7, L76/L92/L93, LQ4/LQ9, LS9, LSA. Also fits all GM Gen III & IV Vortec V8 engines. Does not fit LSX. NOT suitable for front-sump pans such as Pontiac GTO or Holden/Vauxhall Monaro & Commodore oil pans. Please see our front-sump oil cooler adapter for these applications, part number EGM-107. Line Adapter Fittings (Optional). Use these fittings to adapt the ports to the line sizes listed below. These fittings are required except when using hose ends with male O-ring boss connections. Inline Sensor Fittings (Optional). Use these fittings to add an inline sensor to any of the available ports. Line Size and Sensor Port Size. 8AN Male to -8AN Female, 1 x 1/8 NPT Sensor Port. 10AN Male to -10AN Female, 1 x 1/8 NPT Sensor Port. 12AN Male to -12AN Female, 1 x 1/8 NPT Sensor Port. C5 Corvette Temp Sensor for OEM Dash.