NGK R7438-9 CL3 Racing Plug R7438-9

The NGK R7438-9 is a racing spark plug designed for extreme use and grueling racing conditions. These plugs feature a fine wire iridium center electrode and a platinum ground electrode for durability and ignitability. They offer ultra high performance in a variety of heat ranges, with special configurations for diverse racing applications.

The NGK R7438-9 spark plug has a 5/8" (16mm) hex size, a 1.043" reach, and a .028" pre-gap size. It features a heat range of 9 and a resistor type. The center electrode is made of Iridium, while the ground electrode is made of Platinum. This listing includes a box of 4 spark plugs.