What Plug Grade

GTiR_Mic

New Member
I know this may have been covered before by plenty of times but just want to double check on what plugs I should be running in the car.

Should be pushing 350bhp+ on the car and currently running 1 grade cooler (NGK Grade 7 i think) Should I change to grade 8's for putting the car back on the road?

Mic
 
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