i want to change my spark plugs....

i have hager, cai, shorthshifter, clutch stage 1, flywheel, exhaust system..

i thing that if i buy 1 step colder than the OEM, would be better...

or what kind of spark plugs can i buy and whts the right size?

 

from what I have heard the stock spark plugs are really good, you shouldn't need to go colder unless you are boosting or spraying.

 

you're barely over stock power-wise. stick with the stock heat range. ngk's are good.

 

i got mine gapped at .030, than again. I've got more hp than you.

The stock plugs ran good even at 268whp.

So the stockers would run perfect at your power levels.