i was wanting to know whats the best spark plug for a na ecotec i was going to get plain ac delco but it calles for iredems plugs ??? whats your in put for best plug 
 
 
I think I bought ac delco iridium's
 
 
NGK IR IX tested to be the most consistent in horsepower and yield a pretty high peak number... 
...I am the BEST at what I do...
"I guess your right[BlueBoost]. Me and my slow car are failers."
 
Tinkles wrote:Stock ACDelcos
RIP JESSE GERARD.....Youll always be in my thoughts and prayers...
 
 
 
 
the Jew wrote:Tinkles wrote:Stock ACDelcos
this ... though i run AcDelco Platnum Rapidfire plugs in my LD9
