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MSD 6631 6 HVC, Professional Race with Fast Rev Limiter

Part # 6631 Be the first to write a review

For use in Circle Track and Professional Racing, with Fast Rev Limiter

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MSD 6631 6 HVC, Professional Race with Fast Rev Limiter

Estimated Ship Date: 07/22/2026
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Professional race teams have been relying on the power and endurance of our 6 HVC Ignition Control. The advanced component design and circuitry of the 6 HVC Ignitions produce incredible voltage with high current output. Internally there is an efficient heat sync, solid component mounting and it's all encased in a clear epoxy. The rpm limit is adjustable with plug-in modules and the wiring is routed into NASCAR approved Deutsch style MSD connectors.

The Fast Rev limiter is very quick and accurate compared to our Soft Touch Rev limiter.

Features:

  • Includes built-in Fast rev limiter
  • Must be used with HVC Coil PN 8250
  • Built-in reverse polarity protection circuit
  • 150 millijoules per spark up to 15,000 RPM
  • 550 primary voltage output to coil
  • Accepts breaker points, amplifier and magnetic pickup trigger inputs
  • Multiple sparks for 20 degrees of crankshaft rotation
  • 6-pin Weathertight connector, mandatory for NASCAR use
  • Clear epoxy potting compound for vibration protection and clear base plate for easy tech inspection
  • No CARB Exemption Order Number
Brand MSD
Emission Code4
Product TypeIgnition Controllers
WarrantyManufacturer's Limited 1 Year
UPC085132066315
Manufacturer Part Number6631
Part Number6631
4

This part is legal for sale or use on Racing Use Only Vehicles

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street.

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

Instructions for Part# 6631
Designed for professional racing applications that demand high rpm for long periods of time
Manufacturer's Limited 1 Year: See Details
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