14mm Thread - .460 in Reach - Tapered Seat - 2 Pack of 0576S-4 (8 Spark Plugs)ACCEL Shorty Spark Plugs are made with a copper core which is a better conductor than platinum and iridium. They deliver a stronger spark especially in high performance applications where high combustion pressures are present. Copper is much better at dissipating heat than other materials which lessens the chance of a misfire. ACCEL Shorty Spark Plugs are gapable allowing you to open the gap exposing a larger flame kernel or close it if needed for

Prevent cam bolts from backing out at high RPM and load with our cam lock plate and bolt kit for Chevrolet Small and Big Block

rugged fiberglass braid

rebuild them

accurate adjustability

Integrated ZST™ and an ECM filter switch mean direct compatibility with ECM or VSS signals—no bulky control boxes

without a significant increase in NVH

ve installed one of BMR Suspension

Will work with stock & aftermarket starters

towing package Grand Cherokee with Vari-Lock or Quadra Drive

reduced valve bounce

grade 8 mounting hardware

steel thread inserts for long-lasting reliability