Read on the boards that the stock plugs work fine with a two pound pulley. Does anyone beg to differ, or can I put a plug changing project away for awhile longer? Pulley will be installed with long tubes, SBTB (Babolts), JL ram air & JDM flip chip.

Any input appreciated,

Mark

 

I would for extra safety better now than later!

 

I'm getting some misfiring with mine after about 2K miles...have Denso's on the way.

 

I got into the high 12s with a 3 lb pulley and the same mods you listed except the LTs. This was with the stock plugs and exhaust plus M/Ts. I replaced the stock plugs at 18,500 miles(with no detonation noticed) because I was changing to a 5 lb pulley. I drive daily to work and 1/4 mile it weekly.

Dan