|
These are the most commonly used
performance plugs today!
Note: colder plugs work best in supercharged applications and
warmer plugs in general performance uses. Most
cast iron cylinder heads use tapered spark plug
while most aluminum heads use a gasket style plug.
|
Part
No. |
Description |
Temp.
Range |
|
630-24 |
Autolite 14mm thread, .460" reach, 5/8" hex, tapered
|
warm |
|
630-50 |
Autolite 14mm thread, .750" reach, 13/16" hex, gasket
|
standard |
|
630-51 |
Autolite 14mm thread, .750" reach, 13/16" hex, gasket
|
warmer |
|
630-52 |
Autolite 14mm thread, .750" reach, 13/16" hex, gasket
|
warmest |
|
630-133 |
Autolite 14mm thread, .460" reach, 5/8" hex, tapered
|
coolest |
|
630-134 |
Autolite 14mm thread, .460" reach, 5/8" hex, tapered
|
cool
|
|
630-135 |
Autolite 14mm thread, .460" reach, 5/8" hex, tapered
|
standard
|
|
630-2592 |
Autolite 14mm thread, .708" reach, 13/16" hex, gasket
|
competition use coolest
|
|
630-2593 |
Autolite 14mm thread, .750" reach, 13/16" hex, gasket
|
competition use cool
|
|
750-R5671-7 |
NGK .750" reach, 13/16" hex, gasket
|
cool
|
|
750-R5671-9 |
NGK .750" reach, 13/16" hex, gasket
|
coolest
|
|
750-R5673-7 |
NGK .460" reach, 5/8" hex, tapered
|
cool
|
|
750-R5673-9 |
NGK .460" reach, 5/8" hex, tapered
|
coolest
|
|
620-MR43T |
A/C .460" reach, 5/8" hex, tapered
|
standard
|
|
