Am getting new ngk plugs and am wondering if i am goin to notice any difference with them in they should be here if my friend remembers to pick them up













01 yellow 4.8 flowmaster and hypertech 16.0 1/4 stock slow need help

 

How many miles on your truck and in what condition are your present one?

 

My truck has 30k and I just switch to the NGK 55 and it seams that my idle has smoothed out.

 

I changed mine at 50K... just preventative maintaince to me. I didn't notice any power and wasn't after any. Just to preserve what I had. I did wires at the same time...

 

i installed the tr55 like at 55k didnt feel a difference

 

I changed mine and didnt feel anything either. But when I did my first change to Split fire and MSD wires.. I noticed some difference.

 

I changed mine at 80k LMAO and thats no ! So you can only imagine my gains.