Product: Super Fire Racing Spark Plug M-i Series - NGK8
Part Number: 50003-M40i
Plug Type: ISO
Thread Size: 14 mm
Thread Reach: 19 mm
Hex Size: 16 mm
Suitable: K20A, K24A, B Series, 2JZ-GTE, RB25DET, SR20DET.
This plugs are recommended for reliable ignition, durability and anti-carbon buildup under high load. This are the Ultimate spark plug for increasing performance of tuned or stock engines.