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LENNY
06-23-2009, 05:08 AM
Hi can someone help ,the manual lists 2 types of plug for my engine,5.7throttle body injection ,do i use acdelco AC41-932 or MR43lts I know the 41-932 are platinum plug but not sure about MR43lts

TMCNo1
06-23-2009, 07:20 AM
This may help, http://www.mastercraft.com/teamtalk/showpost.php?p=527765&postcount=6

JimN
06-23-2009, 09:45 AM
Hi can someone help ,the manual lists 2 types of plug for my engine,5.7throttle body injection ,do i use acdelco AC41-932 or MR43lts I know the 41-932 are platinum plug but not sure about MR43lts

If you have the Vortec heads, you would use MR43LTS and if not Vortec, MR43TS. Look at the intake manifold bolts- if they're oriented vertically, it's Vortec and if they're inserted perpendicular to the intake/head mating surface, it's not.

M series AC-Delco plugs are stainless but the electrode isn't platinum.