CETRA™ EXTENSIONS PERMIT THE USE
OF LOWER COST TOP THREADED SPARK
PLUGS WITH BG'S NEW CETRA LEADS. . .

And BG's Unique Cetra™ extensions extend plug
life too!

Cetra Extension With Spark Plug Cetra Extension
  • Teflon® coated Viton "O" Ring seals tightly on the spark plug insulator. Because the voltage necessary to "flashover" the spark plug insulator is increased, spark plugs will operate at larger gaps that previously resulted in plug failure.
  • Greatly reduces spark plug cost by permitting the use of top threaded spark plugs instead of shielded spark plugs.
  • High alumina ceramic insulator prevents dielectric breakdown.
  • May be used with Cetra™ leads or conventional shielded leads.
HOW TO ORDER
Select desired length, spark plug, and lead
termination and place the corresponding
"TYPE" numbers here:



CTR		 Extension
Length		 Spark Plug
Model		 Lead
Termination*

EXTENSION LENGTH TYPE
7.75 inches 78
10.25 inches 102
12.25 inches 122
14.25 inches 142

SPARK PLUG MODEL TYPE
RTM77N, RTM79, ALL TOP
THREADED ALTRONIC		 1
RTB80N, RTB77WPCC 2
RTM77PP, RTB78N 3

LEAD TERMINATION* TYPE
Standard length terminal S
Extended length terminal E

*Extension has a female terminal on top that accepts spark plug leads with (1) standard male terminals such as P/N's M531, 21011 & 21981-1, or (2) extended male terminals such as 21143 & 21102. See page 45.

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