Spark Plug Set Vortec 5.7L Autolite Set Of 8 OEM RP030008

• 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, .060 IS RECOMMENDED
• This Autolite plug set crosses to the AC Delco MR43LTS

Recommended by the manufacturers for optimum performance, these spark plugs are the correct heat range for your marine engine