i have an 01 lightning with a chip and exhaust and just a boost bypass. i am going to get a 4#pulley in a couple months but want plugs now. iknow i need different plugs for bigger pulley but will it hurt to go ahead and the plugs in and run it like it is. and also which plugs do i need ngk tr5 or ngk tr6s, or denso it 22s. thanks

 

Have a 4# on allready and I did put my denso's in ahead of time because once you step on it with the pulley it gets addicting,cheap insurance from mis-fire

 

I would go with the denso IT22's.

try and do it at the same time and you'll be ok. it only takes an hour or so to do plugs.