Ngk Spark Plugs

D7Ea - 12Mm - 3/4'' Reach - For General High Performance Or High Compresion Applications.
D8Ea - 12Mm - 3/4&Quot; Reach - For General High Performance Or High Compresion Applications (One Range Colder).
D9Ea - 12Mm - 3/4&Quot; Reach - Very Cold Plug For Turbo Applications.

Ngk - 14Mm - Short Reach
For Use With New Or Rebuilt Stock Heads.

B5Hs - 14Mm - Short Reach - Same As The Bosch W8Ac (Standard Heat Range).
B6Hs - 14Mm - Short Reach - Same As The Bosch W7Ac (Colder Heat Range).
B8Hs - 14Mm - Short Reach - Very Cold Plug For Turbo Applications.

Ngk - 14Mm - 3/4&Quot; Reach
For Use With Stock Type 4 Or 914 Heads. Also Fits Our Super Flo And Street Eliminator Heads.

B5Es - 14Mm - 3/4'' Reach - Same As The Bosch W8Cc (Standard Heat Range).
B6Es - 14Mm - 3/4'' Reach - Same As The Bosch W7Cc (Colder Heat Range).
B8Es - 14Mm - 3/4'' Reach - Very Cold Plug For Turbo Applications.