Product Summary

HEI / Male Cap Type, Mechanical and Vacuum Advance Type

  • Cast Iron Distributor Gear
  • Simple One Wire Hookup
  • 50,000 Volt High Output Coil
  • High Dwell Dyna-Module
  • No Add-On Spark Box Needed
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Key Specs

MFG. Part #
BrandPerformance Distributors
Cap TypeHEI / Male
Advance TypeMechanical and Vacuum
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Need To Know

Quick and Easy Returns

Return Policy

Details

Add serious firepower to your Chevrolet engine with the Street/Strip DUI! The DUI (Davis Unified Ignition) has everything you need for the ignition system 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. Whether your engine is bone stock, mildly modified or heavily modified, we can tune a DUI for you. So, don’t be fooled by the cheap rebuilt and so-called “performance” aftermarket HEI’s, insist on a quality distributor and start Driving Under the Influence of the Davis Unified Ignition!


The D.U.I. Advantage

  • Drop-In Installation
  • Simple One Wire Hookup
  • 50,000 Volt High Output Coil
  • High Dwell Dyna-Module
  • Performance Tuned Advance
  • No Add-On Spark Box Needed
  • Hand Built to Exact Tolerances

CARB Warning

For use on pre-1966 vehicles only

Emissions warning: this part only legal for sale or use in California if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. ++any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering there are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

Specifications

KEY SPECS
MFG. Part #
BrandPerformance Distributors
Cap TypeHEI / Male
Advance TypeMechanical and Vacuum
GENERAL
Trigger StyleMagnetic
Computer Controlled CompatibleNo
Gear MaterialIron
Gear RotationStandard
Distributor Cap Color
Ignition Box RequiredNo
Mechanical Tach DriveNo
Slip CollarNo
Housing MaterialAluminum
Housing FinishMachined
Shaft Diameter.491"
Marine UseNo
Coil IncludedYes
Sold in QuantityEach
GTIN Code

Questions & Answers

1 Question • 1 Answer

Does your distributor come with a melonized gear and an adjustable Vaccuum advance?

by Rick

• 2 years ago

1 answer

1 of 1 questions shown

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