Ignition Module, DUI, All 6 Cyl & V8 DUI/HEI (Non-Computer)

GM HEI 4-Pin Dyna-Module by Davis Unified Ignition®

Increased electronic dwell gives the HEI coil more charging time.

The Davis Unified Ignition® Dyna-Module increases electronic dwell to give the HEI coil more time to charge before firing. The additional saturation time supports spark output, throttle response and low-speed operation. The four-pin module mounts in the original HEI location without distributor modifications. It is compatible with matching four-, six- and eight-cylinder HEI/DUI distributors and Performance Distributors GM Tri-Power systems. It can operate with a compatible HEI coil; the matching DUI coil provides the intended paired performance.

• Four-pin HEI/DUI module for matching 4-, 6- and 8-cylinder distributors • Increased dwell supports coil saturation and spark output • Installs in the original module location without modifications • Compatible with matching GM Tri-Power ignition systems • Works with compatible HEI coils; module supplied separately