OE ACDelco plugs
GM cars don't seem to like anything other than that.
My Alero missed all the time with the Bosch +4's. I also bought a cheaper plug for my old Delta with the stock 307. Missed like crazy and had to be towed. The 1968 olds 350, with mid 1970's style ign i put in that car didn't like something other than stock.
Didn't take any chances with my Olds 330 build. OE 1967 style ACDelcos
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33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
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