I have a 261 with full flow but I don't remember a plunger when I installed it in 2004. Is this a bypass valve so the oil filter is bypassed on cold startup? I have a NAPA 1072 spin on filter which has its own bypass valve.


1948 3/4-Ton 5-Window Flatbed Chevrolet

34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.