I have a bam engined 8l s3 running - *cus code stage 1 *3" dp + decat *badger 5 - 3" tip *forge 008 dv It runs sweet as a nut approx 280 bhp (apparently, according to r/r + torque obd) The spark plus were due a change as 1 of them had more or less fell apart at the spark/ceramic end causing a miss fire. So I ordered the colder running ngkbkr7e and gapped them to 0.7 mm. The car ran OK, if a little lumpy then miss fired quite bad at 3k rpm. So I promptly changed back to standard original ones, miss fire is now gone. Any ideas what the prob is with the ngks ? When I pulled them out after 5 min they all had a white powdery coating/spark/burn marks on the spark end.