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Okhan19 · 04-14-2018, 02:18 PM

Just installed the flex fuel plugs firstly people seem to have the NGK number wrong it is SILZKBR8F8S. This indicates it should be the same heat range as the stock N20 plugs but they appear to be colder plugs based on the design (see pics). I gapped the plugs to 0.024" seems to smooth out the power delivery and eliminated a rough spot at 3000 rpm. Anybody else use these plugs as yet?

04-14-2018, 02:18 PM	#109
Okhan19 Enlisted Member 26 Rep 40 Posts Drives: 328I 2015 ATM rktune downpipe Join Date: Apr 2018 Location: Jamaica iTrader: (0)	Installed the flex fuel plugs SILZKBR8F8S Just installed the flex fuel plugs firstly people seem to have the NGK number wrong it is SILZKBR8F8S. This indicates it should be the same heat range as the stock N20 plugs but they appear to be colder plugs based on the design (see pics). I gapped the plugs to 0.024" seems to smooth out the power delivery and eliminated a rough spot at 3000 rpm. Anybody else use these plugs as yet? Attached Images
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