Page 8 of Earl's Performance Automotive Cooling Systems by Holley Performance Products, Inc.

oil cooler components cooling systems oil filter by-pass adapters many installations particularly oil cooler installations require the oil filter to be relocated earl s has bypass adapters for most spin-on and many bolt-on applications they are quick and easy to install all ports are 1/2 npt female unless otherwise noted o-ring cross section part no thread port size o-ring o.d 1177erl 3/4-16 1/2 npt 2-3/4 69.2mm .139 1178erl 3/4-16 1/2 npt 2-3/4 69.2mm .139 typical applications most ford chrysler toyota nissan v-w vehicles with spin-on filter many other foreign makes cooling systems 1277erl 3/16-16 1/2 npt 2-3/4 3-3/8 inner 69.2mm outer 85mm .139 typical applications most general motors and american motors vehicles with spin-on filter 1377erl bolt on chevy 1/4-20 5/16 -18 bolts 1/2 npt typical applications chevrolet v-8 without spin-on filter includes both bolt sizes and supercedes 1477 1577erl 18mm x 1.5 1/2 npt 2-3/4 69.2mm .139 1578erl 18mm x 1.5 1/2 npt 2-3/4 69.2mm .139 typical applications some general motors vehicles with spin-on filter 1677erl bolt-on v.w 3/8 npt typical applications v-w type 1 and 2 3/8 npt ports if you are unsure which adapter your vehicle requires or don t find your vehicle listed please call factory for correct part number tech line 310-609-1602 57

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