12mm Thread x 19mm Reach
5/8'' Hex
Projected Tip
Gasket Seat
IXU-Series plugs have a special hardened purified alumina powder insulator for increased strength and thermal conductivity for hard core racing applications.


12mm Thread x 26.5mm Reach
9/16'' Hex
Projected Tip
Gasket Seat


14mm Thread x .460'' Reach
5/8'' Hex
Non-Projected Tip
Tapered Seat
ITF-Series plugs have a 1.5mm insulator projection for better ignitability in older domestic applications.


14mm Thread x .460'' Reach
5/8'' Hex
Projected Tip
Tapered Seat
ITF-Series plugs have a 1.5mm insulator projection for better ignitability in older domestic applications.



14mm Thread x .708'' Reach
5/8'' Hex
Projected Tip
Tapered Seat
IT-Series plugs have a 1.5mm insulator projection for increased performance, while the -0.5mm projection offers better heat resistance, in newer domestic applications.






14mm Thread x 1/2'' Reach
13/16'' Hex
Tapered Tip
Gasket Seat


14mm Thread x 19mm Reach
13/16'' Hex
Projected Tip
Gasket Seat
IW-Series plugs have either a porcelain projection of 1.5mm for better ignition or a -0.5mm projection for better heat resistance.









14mm Thread x 19mm Reach
16mm Hex
Projected Tip
Gasket Seat
IK-Series plugs 1.5mm projection are perforemance focused, while the -0.5mm projection plugs emphasize heat resistance.