While I prefer the stock copper plugs, have had a couple 6tt's come in running NGK and Denso Iridium's without issue, you should be fine

 

Great....thanks

 

Gap @ .034?

 

.040 well maybe k24 turbos but for my level i cant run those gaps. To wide of a gap for me and my tuner.

 

04 996tt X50 stock

 

Here you go everyone says .026 to .028

https://www.6speedonline.com/forums/...o-out-box.html

 

So be it....thank you.

 

I'll second checking the Maf. Mine went and I had terrible misfire under load. no lights on the dash. When I pulled the Maf it ran perfectly but with the ABS/PSM lights on. I cleaned the Maf but when I put it back in it wouldn't recognize it so I replaced it. Runs great now.

 

Most tuners and experts over here chose NGK PFR7B plugs and NGK coils.
Never heard of any car missfiring with these suckers.

 

a more recent threads we talked about this...https://www.6speedonline.com/forums/...parkplugs.html
https://www.6speedonline.com/forums/...-tuned-tt.html

 

That would probably be good, be careful gapping them, do not damage the centre electrode

 

most plugs that are to be used in this car are pre-gapped. that said, i am told and always use .027 w OEM Bosch FR6LDC for a tuned tt.

the more important aspect is the heat range & gap, less so the brand of plug as long as it is regularly used in this car. so ngk/denso/bosch/beru all ok. just make sure they are a "6" and recommended for the car.

from that other thread and "tony" from EPL

".026-.028If you plan on running more then 1.2 bar , gap them a little tighter."

 

Have a new maf on order....just one of the maintenance parts suggested to replace @ 55k miles. Will be removing engine/tranny this winter to fix everything.

 

That thread does not help much.

 

Bingo. Exactly what I did.