Spark Plugs

[jt98boost]

Can anyone tell me the part number for 2 heat ranges colder on a autolite and a NGK spark plug, Its for a 98 cobra Thanks

 

[CanadaStang]

Can anyone tell me the part number for 2 heat ranges colder on a autolite and a NGK spark plug, Its for a 98 cobra Thanks

AUTOLITE

PART# / HEAT RANGE
764s / Stock
103s / 1 heat range cooler
AR94 / 2 heat range cooler
AR93 / 3 heat range cooler


NGK

PART# / HEAT RANGE
TR-55/ 3951/ Stock Heat Range
TR-6/ 4177/ 1 Step Colder
BP7EFS (PN - 3526) BR7EF (PN - 3346) two steps