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Designed after the original 1948-52 F-1 pickup units
64-2189BLK
AR250-3004
Two 1/8” NPT ports and plugs are provided for auxiliary sensors
with a four-in-one jump starter
Big Block Chev Exhaust Rotator Eliminator CO4779-8 250 Designed after the original 1948-52Big Block Chev Exhaust Rotator Eliminator1. 732" O. D, Spring O. D 1. 568", Spring I. D . 623", Thickness . 300" CO4779 8 4779 8 Late model Big Block Chevrolet engines are originally equipped with exhaust valve rotators. Until now, the only way to make up for the rotator was to stack . 300" of shims under the spring. This was not only sloppy, but they also didn't fit well. These seat spacers offered by COMP Cams will locate the spring with an outside