What are the best spark plugs to run on a 1997 A4 1.8T AEB engine? I'm currently running a Forge Diverter Splitter Valve, K&N Air Intake, Custom 2.5" cat-back exhaust with 4" Vibrant TPV muffler & soon to be added a Speed Tuning Chip. Let me know what you guys are running on your b5's! Looking to buy some NGK copper plugs...

 

For being chipped go with NGK BKR7E. They are one heat range colder than stock-replacement plugs (which in copper would be BKR6E).

 

Q: What about Spark Plugs? What should I get?

 

I looked on AutoZone and SparkPlugs.com and both said that those plugs aren't compatible with my car?

 

NGK BKR6E until you are chipped, NGK BKR7E after you are chipped.

Stock gap should be .032, chipped gap should be .028.

 

Once you start modding, you have to be careful with things like that... BKR7E won't really be ideal for a STOCK car, which is all the AutoZone and other places will reference. But once you're chipped they'll be the better choice.