NGK Iridium IX Spark Plug 14 mm Thread 0.749 in Reach Gasket Seat - Stock Number 6664 AA0700AG3R57 or add a switch for

or add a switch for a high speed retard

1981-1997 GMC C2500

2013-2015 Isuzu NPR

Programmer Included

NGK Iridium IX Spark Plug 14 mm Thread 0.749 in Reach Gasket Seat - Stock Number 6664 AA0700AG3R57 or add a switch forProduct Description: Spark Plug NGK Iridium IX 14 mm Thread 0. 749 in Reach Gasket Seat Stock Number 6664 Resistor Sold Individually With over 80 years of automotive expertise, we are driven by extreme dedication to performance and quality. From OEM to aftermarket, our people push the boundaries of innovation to bring the latest technologies to market under the NGK and NTK brands. Since 1936, NGK Spark Plugs has been the world leader in technology,