Original Crusader - PCM Spark Plug Set RP030008 Includes 8 Plugs GM Vortec 300+ HP Replaces the MR43LTS The Vortec engines have the intake manifold bolts installed going straight down Non-Vortec bolts are angled PLUG GAP .045 IF USING WITH HVS IGNITION, .0
Recommended by the manufacturers for optimum performance, these spark plugs are the correct heat range for your marine engine
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