AC Spark Plugs

[Spooling]

Curious what the difference is between AC # R43TS - which I specifically asked for and consequently have used for mannnnnny years, and what I see the local Parts Store Guy gave me - when I inspected my goodies at home here - namely AC # CR43TS.

TIA

 

[TR Custom Parts]

Same heat rating but better construction, nothing to worry about it. Believe the C stands for commercial.

 

[forcefed3.8's]

Yep, they have a heavier center electrode.

 

[Spooling]

Excellent Guys - Many Thanks!!!