96 GTS Plugs: Using Champion rc12ecc instead of rc12lyc

[Tom and Vipers]

Both plugs look identical. What is the difference?

 

[MoparMap]

Just guessing by the part number, I think maybe the RC12ecc plug have more resistance built into them for radio interference prevention? The R12ecc is the standard plug on gen 3 cars at least, so I don't know that I'd have any real reservations with using them on an earlier car if they physically look the same and have the same threads and general dimensions.

 

[Bill W]

Double copper in the ecc vs single in the lyc. I just put a set of rc12ecc plugs in my gen ll. Runs great.

 

[Tom and Vipers]

The Champion reference information is a shadow of what it used to be back in the 70's. Their codes are not standard: a 3-letter code could be 3-things or 1.

Thanks