NGK TR6 spark plug to suit the Holden VT to VF Commodore with the LS1, LS2, LS3, LS6 or LS7 V8.
Brand: NGK
Plug: TR6
NGK stock numbers: 4177 / 6078
Heat range: 6
Size: 14.0mm thread x 17.5mm reach, 16.0mm hex
Resistor type
Car gap: 0.8-0.9mm
The TR6 is a common replacement plug for naturally aspirated LS engines. If your engine is supercharged or turbocharged, ask us about a colder or racing plug.
An LS V8 needs eight plugs. Call us on (02) 5854 9001 if you want a hand choosing. We ship Australia-wide from Dubbo NSW.