well I'm definately running nova long turbo plugs the only reason I know that they work is I used to run OS p3's but all I had spare in my parts box where long novarossi plugs one day so I gave it a try

with the turbo head button the long rossi plugs do work the first thing I checked was how the plug seated when tightened up to make sure it wasn't goin to be a problem. you don't need to put washers or anything on the plugs just make sure they're tight. I haven't used a OS plug since (over 6months now)

again this is just what works for me

and as any Married man says "go on give it a try you just might like it"

Adrian