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run those in my trans am...runs low 12s(not a huge deal) but its a good plugNGK TR55
Are the stock acdelco plugs any good ?
Picked up my chilton manual while doing my tune-up on my 1998 5.7 Vortec and it said the sparkplug gap should be .035 but I got to O'reilly's Auto and they said .060. Who's right?
What's the part number for left (drivers side) exhaust manifold for a 98 gmc sierra 5.7 vortec ¿? Thanks