Hotter spark plugs for 1979 T/A 403

2firebirds

Registered User

Join Date: Mar 2004

Posts: 55
#1

Hotter spark plugs for 1979 T/A 403

05-05-2006, 09:41 AM

The stock AC Delco plug # is R46SZ. Does anyone know what the next
AC delco hotter plug # is?

1979 Trans am
403 olds motor

Thankyou
Brian

2 firebirds are better the 1.
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SteveH95Formula

Registered User

Join Date: Jul 2003

Posts: 265
#2

05-06-2006, 12:26 PM

Usually the higher the number the hotter the plug. R47 would be hotter.
Most small block Chevys use the R45 plug.

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