- Perfect replacement part or upgrade
- Designed to deliver trouble-free, consistent performance
- Right for your vehicle and lifestyle
- Made from high-quality materials for ultimate durability
- Manufactured to meet or exceed strict quality requirements
MSD's "stock appearing" Circle Track HEI Distributor is designed with a bulletproof ignition module for ultimate reliability from idle to max RPM. A high-output ignition coil in the cap produces peak spark energy at any RPM, while a quench, polish, quench nitride or tuff ride (QPQ)-coated chromoly advance cam and weights provide smooth operation and precision timing.