NGK plugs for 03 - TR6 or TR55

[cobra808]

Okay, I went to NGK's website.

For an 03 Cobra, their standard replacement plug is listed as TR55.

For an 04 Cobra, their standard replacement plug is listed as TR6.

Anyone knows what the difference is besides the part #? :shrug:

WC

 

[InfamousSVT]

TR6 is a colder plug I believe

 

[thxone]

TR-6 is one step colder

 

[metaman]

If still running the rich factory tune the tr55 would be better because it will be able to burn the carbon off of it more effeciently (hotter plug). If you are running a leaner custom tune or box tune then the tr6 would be better because there is not as much carbon build up on the plug.

 

[ugotbit03]

or just buy denso's... i had no luck with the tr6's