Not to bad. I'm lucky the Venom kit has so many fail safes that it shut everything down before it went BOOM. I lost these spark plugs and had to change the oil. So I was very lucky! But that is one reason why I bought that kit, for all the safety features.
2002 Mustang GT
H&R, Bilstein, NX, K&N, Bassani, and Prochamber
03 Cobra wheels, Goodyear Eagles: 275 fronts, 315 rears
325HP and 433 ft-lbs at the wheels
Old Car:
2000 SVT #463/2150
Best #'s - 268.5HP and 275.8 ft-lbs at the wheels
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