OK, I gotcha....that is cool. BTW I got the leaves done today with the mower, the mulch deck does a decent job on them. I need a vacation however....I have 2 weeks left. I am definitely going to use them soon.

do they put irridiums in the l67 from the factory? I'm not sure they do. anyhew, as an l36, you're just fine with iridiums, and they'll last a good long while in your car...

Yes, irridiums are installed from the factory, but the direction most of us go is Copper after dropping at least one pulley size. Platinum is a no-no with forced induction of any kind (turbo, SC, Nitrous). Irridium may be ok stock, but as a general rule of thumb, copper is best for Forced Induction.

This may be a stupid question, but... why is platinum a bad thing for forced induction?

Read Techinfo. It'* all explained there if I recall.

Right... Techinfo...

Oh, it'* a heat thing. Melting temp of platinum is less than that of copper. Very interesting.

I always forget about Techinfo..

So for NA cars, should we run irridiums? What gives the best results?

Autolights here... + they are so cheep that you can afford to change them a lot.

I use AL 104s

But you should use copper plugs in supercharged cars, right?