All 216 and 235 engines (and 1954-57 261) require a bypass canister and a bypass filter (see picture). AC canisters are built to seal around the P-115 cartridge (see picture). Factory Chevrolets ordered with an oil canister were painted black. The P-115 can be replaced by WIX 51100 and is rated at 23 5 (FIVE) microns which is a finer filtration than conventional full flow filters. NOS metal oil cartridges can rust after sitting many years on the shelf.
Last edited by buoymaker; 08/10/20222:20 PM.
"Adding CFM to a truck will only help at engine speeds you don't want to use." "I found there was nothing to gain beyond 400 CFM."
