I happen to be a GM tech, and I can tell you the irridium plugs absolutely ROCK!

They last for just about forever and in an application like any LS1 powered car they seriously increase plug life (compared to old style plugs). 100K miles+. Very nice when you're talking about any F-body (Camaro/Firebird). I hate changing plugs on those.

Irridium plugs come stock from the factory on nearly all GM products now. If you do to your local GM dealer that's what they'll give you over the counter. I think they are either Densos or NGKs.

Clay


1990 Montero RS (In pieces... for now)

KG6VNX