I’m 90% sure my EGTs came with Bosch plugs, switch to NGK that are 2 steps colder for my tune haven’t had any issues with them for about 25k miles
OE plugs for this engine is NGK Laser Iridium. Hyundai/Kia usually use either Denso or NGK plugs.
I'd get OEM wires and NGK iridium OEM speck plugs.
Went with the fancy ngk plugs. A man of culture. I put those in my Volvo and they say it's heresy.
I've use NGK products in American, Japanese and German vehicles for over 30 years with absolutely no problems at all. Note that NGK spark plugs come with a proprietary anti-seize coating on the threads, so no extra anti-seize is necessary at all.
I’m running NGK racing plugs # 4654 or R7437-9 no issues.
The NGK 5690 is a clone of the Bosch copper nickel FR7HE02 it’s cheaper and runs great in a 2.5. It’s actually oem for 170hp 2.5. Change it at 40k. It’s the last plug VW put in 2.5s so it should be the best one. It’s one notch colder than the NGK laser platinums. The NGK 5690 will allow the motor to pull more timing and more power. For best results use 91 or above. It’s even in the owners manual.
My personal experience is that NGK brand for any type of spark plug is superior to others in all vehicles. I use the NGK iridium plugs in my Rabbit and my Honda cars. My older Miata had a wasted spark system and required a change interval of 30K miles, regardless of the plug, so I used the NGK copper plugs in it and there was no difference in performance at all.
I've seen with a digital tachometer a 1,000rpm difference between a laser brand spark plug and the oem ngk spark plug in a chainsaw. So for me it's what the oem uses is what I put back in.
I'm Stage 2+ with r8 coil packs and ngk BKR7EIX and still get misfires. I'm not happy about it and I'm not sure what to do.
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