Spark Plug Equivalents

[trbodon21]

Just to refresh my memory what are the equivalnets for the following spark plugs in Autolite and any other brands that you guys are using:

AC R43TS
AC R42TS

 

[edchapman]

Autolite 24 plugs work well along with the AC R43TS.
Not sure what is thier one heat range colder like the CR43TS .

bye, Ed
http://edchapman.tripod.com/cars.html --------- runner up B-5 GS nats 2004
84 T-Type WH1 15.4@89 stock, 87 T 14.1@97 stock, 87 GN stock 399/400 points

 

[Turbo T/A 1543]

R43TS equivalent is Autolite 25. R42TS equivalent is Autolite 23.