Anybody out there using the E - 3 plugs? the pro guys claim they use them, probably just for advertising purposes.
Thought about trying them but are they worth the price? ive had good luck using NGK race plugs and autolite.....

86 Daytona - 612/ glide - 2400lbs - 8.60 alot more left
71 S/G Challenger - 469/glide - 2800lbs - 9.20s and tuning
70 Challenger - mild 440/727 - 3475lbs - 10.96 best
70 GTX - future quick 16? more $$$$$$