Originally Posted by Maxt' post='905877' date='Aug 5 2008, 01:10 AM

They will outlast stock plugs by a factor of 3 even with an ignition amp. You can index them to spark towards the approaching charge, they do make more hp than stock plugs, a little more safe advance can be had, I tested it on my own dyno. As for fouling on street cars, never had it happen, and I run 10.5's on my n/a p-port, 11.5's on my TII. Getting rid of the junk aftermarket apex seals, got rid of my hot start problems.....

Originally Posted by Comitatus' post='905889' date='Aug 5 2008, 07:47 AM

How do you index them to face the approaching charge?

Originally Posted by j9fd3s' post='905897' date='Aug 5 2008, 01:27 PM

you can shim them.