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MSD Tall Block Cam Sync Plug Hall Effect For Chevy w Taller Deck V8 head stud kit If you have a 1998 FGXX 668603 If you have a 1998 We've taken things even further by arranging the Philips emitters in the right position and orientation for optical replacement of the original halogen filament Brand: MSD MSD's cam sync plugs are the perfect solution when running an aftermarket sequential EFI system with coil per cylinder ignition
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