TR5 V-Power Spark Plug | NGK 2238 Premium NGK spark plugs are known for their reliable performance and superior anti-fouling characteristics. NGK spark plug TR5 Stock number 2238 14mm thread size 17.5mm thread length Resistor Tapered seat V-Power Type Gap 0.039 in. (1.0mm) 5/8 in. or 16mm hex Replaces AC Delco MR43-LTS Replaces Crusader R030008A Replaces Champion RS9YC Replaces Mercury 33-862029