SKU: NGK-R6725-115 Categories: , Tag:


NGK-R6725-115 is an out and out race spark plug. This spark plug should only be used in ultra high performance engines. It is advised to 'warm up' the engine using a much more cost effective spark plug, then when warm, switching to these spark plugs. At close to $50 a pop, you dont want to foul a set of these warming up your race car in the pits or moving the car on/off the trailer.