not sure if this was already ask...

what can you say or did somebody already use bosh platinum 4 spark plug?

http://www.boschusa.com/AutoParts/Sp...latinumPlus4/#

 

EVO comes stock with the slick Iridium plugs

 

only use iridums is your evo.

 

the bosh plus 4's don't reallt do anything for your car that any other platinum plug would, it's only made to last longer, they don't fire all fpur at the same time like a lot of people think. all they do is fire on the path pf least resistance so it alternates which grounding strap it fires on. and iridium is a lot better than platinum anywho

 

Platinum plugs aren't good. You cant make any observations when doing maintenance.

 

I put those 4 ground plugs in my nissan once and it ran like **** with them. Definately not for the Evo.