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Davis Unified Ignition

Distributor, DUI, Street/Strip, Buick Riviera/Skylark, HEI

Vehicle Specific View fitment for 2 models
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Part# S241399
Mfg# DUI-63720BK
Sold As Each
$365.99
List Price: $403.95
You Save $37.96
Low Stock
Only a few left for immediate delivery

Color Variation

Due to variations in monitor settings, some colors on this page may appear slightly different from GM originals. In addition, due to color differences in the original GM dye lots, interior product colors may vary slightly.

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Hand Built To Exact Tolerances No add-on spark box needed

Add some serious firepower to your engine! The DUI (Davis Unified Ignition) has everything you need for the ignition in one simple unit. No external coils or spark boxes are needed. Just one 12 volt hot wire hooked up to the DUI sends 50,000 volts of pure spark energy to the plugs for a cleaner, crisper, more powerful running engine! Part of the DUI’s performance comes from the custom calibrated advance curve. A special weight and spring assembly is hand fitted and dialed-in using a Sun Distributor Machine for a precise timing curve that will match the specifications of your engine and vehicle. The super smooth advance provides instant throttle response and maximum power throughout the rpm range with no pre-detonation. Vacuum advance is provided for improved fuel economy and cleaner spark plugs. The DUI’s high output spark comes from our 50,000 volt coil and Dyna-Module. The high voltage coil allows spark plug gaps to be opened up to a massive .055"! The dwell in our Dyna-Module has been increased electronically to allow the coil to produce a longer duration spark. The combination of the larger gap and longer duration spark provides the most complete combustion of the fuel mixture possible for increased horsepower and torque. Additional benefits include quicker starting, smoother idle and better fuel economy! All DUI caps have the brass terminals for optimum conductivity and superior resistance to corrosion.

Notes

  • This item is not eligible for any further discounts or promotional pricing.
3
This product is not legal for street use on an emissions-controlled vehicle. It may be used on dedicated competition or pre-pollution-controlled vehicles only. Learn More

Find Item In These Catalogs

  • 2024 Riviera 1963-76 91
  • 2024 Skylark, GS & GSX 61-72 186
WARNING: This product can expose you to chemicals including lead, sulfur, nickel, chromium, vanadium, titanium, polyvinyl chloride, and 4,4’-methylenebis (2-chloroaniline), which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Vehicle Fitment

Year Make Model Application Details
1963–1976 Buick Riviera 1963–1966: 322-364-401-425 ci nailhead V8
1967–1976: 400-455 ci BB V8
1961–1972 Buick Skylark 215-350 ci SB V8
225 ci odd fire V6
1967–1972: 400-455 ci BB V8
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