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PeterWT · 01-11-2021, 04:02 PM

I'd like to know the answer to this as well.
I'm at 30K miles and just replaced the plugs (NGK) and flashed stage 2 MHD.

I checked the gap on the new NGKs and they were all larger than .030. I gapped them to a tight .030 (~.029) because it's my understanding that as plugs wear, the gap increases.
The OE plugs (Champion) all had gaps smaller than .030. I'm not sure why or what to make of that.

01-11-2021, 04:02 PM	#2
PeterWT Lieutenant 254 Rep 558 Posts Drives: '17 M240i, AT, BSM Join Date: Dec 2016 Location: Florida, USA iTrader: (0)	I'd like to know the answer to this as well. I'm at 30K miles and just replaced the plugs (NGK) and flashed stage 2 MHD. I checked the gap on the new NGKs and they were all larger than .030. I gapped them to a tight .030 (~.029) because it's my understanding that as plugs wear, the gap increases. The OE plugs (Champion) all had gaps smaller than .030. I'm not sure why or what to make of that. __________________ My 2017 M240i: MHD, xHP, Modded OE Intake, AA GESi 400 CPSI Cat DP, Dinan Mid-pipe, M Performance LSD & Rear Diffuser, BMS Exhaust Tips, Apex EC-7 Wheels, M-Tech Front Lip, iND Painted Mirror Caps, Smoked Reflectors Last edited by PeterWT; 01-11-2021 at 05:50 PM..
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