These are really tough to find and if you run a boosted A4 (more that stock), they are worth their weight in gold. Course they cost that much too.<p>If found a pretty good price and source,<p>http://www.ebsracing.com<p>Give them a call, I'll warn you though they are $16.50 each!<p>If you have alittle knock with a stock plug this should fix it, they are 2 ranges colder than stock. Gap, I can't remember, but I'll look that up and let you know. DonP, are you listening, how much gap?<p>Alan

Sorry, no gap info.<p>Be warned that these plugs can cause a slightly rough idle if you idle for a long time in traffic -- the plugs cool off below optimum operating temprature. BTDT. Folks living in a frigid climate take note that these may be more likely to foul in really cold weather. I live in the south (72 degrees today) and I think we had like 12 days below freezing last year so it's not an issue for me.