Spark plug NGK or AC DELCO

PFR6Q was equivalent to the stock Bosch plugs. They work fine.

I used NGK BKR5E-7938 they are awesome plugs, i only paid $14 for mine but i have a friend who pays cost. they are around $80.

I used to run NGK tr55's in my mach1 but for some odd reason they had a tendency to become loose I thought it was my heads but I switched to a brisk plug over 30k ago and haven't looked back I will be buying them for all my cars.

installed new plugs and R8 coils today no misfires anymore. this car is f'ing FAST now!

just did my coil packs and plugs. Used E version Hitachi Made in Japan coils. to my surprise the NGK Laser Cut Platinum plugs PFR6Q came gapped at .028, I was expecting them to be set at .032 from the factory, so it was a simple replacement. No more misfires over 20 psi

New NGK Spark Plugs

I'd replace them immediately, you'll notice an improvement right away.

You will have improved power and fuel efficiency if you replace those plugs.

NGK BKR7EIX is a popular plug for 1.8T and 2.0T, but it is one step colder in the heat range. Fine for those whom don't see freezing and below temps.

I went out bought the NGK plugs and installed them moments ago. Reset the codes and started the engine. Within 1 minute I had the CEL and the P0351 - P0354 codes.