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View Full Version : Gbranham's MkIV 427/IRS/TKX Build Thread...Spark Plug Shenanigans


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Mike.Bray
02-28-2026, 04:50 PM
So many people miss this small step.

I'm sure it's a lot more crisp.
gbranham
02-28-2026, 05:55 PM
So many people miss this small step.

I'm sure it's a lot more crisp.

In my case, I must've consciously gapped my plugs DOWN to .025", because the plugs I bought the first time (and the 2nd time) were gapped at .040" out of the box. Brain flatulence, apparently! :)

Greg