Posted By: scottb
W5 heads - 06/16/19 11:55 PM
What are you running for spark plugs in your W5 heads
Posted By: Racer33
Re: W5 heads - 06/17/19 02:53 AM
Pretty sure mine are NGK R5671A-7. Thats from memory so I could be wrong. I think it's the same plug in my W2 heads