Product Summary

HEI / Male Cap Type, Mechanical and Vacuum Advance Type

  • Fits Chevy Small and Big Block V8 Engines
  • Built-In Coil with Magnetic Trigger
  • Adjustable Vacuum Advance
  • Includes GM Melanized Steel Gear
  • Made from Cast Aluminum with Polished Finish
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Key Specs

MFG. Part #141-683
BrandProform
Cap TypeHEI / Male
Advance TypeMechanical and Vacuum
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Proform 141-683 Details

These premium distributors include authentic Chevrolet Performance melonized steel gears (USA), which are required on all Chevrolet Performance crate engines, or serious damage will occur. Validated harness and capacitor for reliable energy flow, Adjustable vacuum advance for fine tuning the rate and amount of advance that will result in increased power and eliminate harmful detonation, High-performance module: engineered with low saturation for maximum spark intensity, Bronze bushings precisely installed and line- honed for perfect positioning, Durable, centerless ground coated shaft for reliable energy transfer and long-term, trouble-free performance. FINAL ASSEMBLY, AND INDIVIDUAL INSPECTION IN WARREN, MICHIGAN.

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or 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.

Proform 141-683 Specifications

KEY SPECS
MFG. Part #141-683
BrandProform
Cap TypeHEI / Male
Advance TypeMechanical and Vacuum
GENERAL
Trigger StyleMagnetic

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