Allstar Performance Spark Plug Boot Sleeves - Black - 7-1/2" - (8 Pack) 7140BK and RS7C LTWT helmet models

and RS7C LTWT helmet models

Single 3/8 in Hole

1966-1973 Dodge Charger

however some low RPM loss of torque might occur

Allstar Performance Spark Plug Boot Sleeves - Black - 7-1/2" - (8 Pack) 7140BK and RS7C LTWT helmet modelsFiberglass braided sleeves are heat resistant to protect spark plug boots from header heat up to 1,200F. 7 1 2" long sleeves slide over a variety of boots. Specialty items for the Shop, Trailer and Track. The Allstar Performance brand offers thousands of hard to find, specialty items that cover many segments in the performance aftermarket. For over 30 years, customers worldwide have come to rely on the quality, affordable and practical items available