Hooker Blackheart Gen III Hemi Shorty Swap Headers - Stainless

1973-1974 Mopar A-Body (Dodge Dart/Scamp & Plymouth Valiant/Duster) Gen III Hemi Swap Heaaders

Part # BH23104
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This product is engineered to facilitate the installation of a later model, emissions friendly engine into a vintage / classic vehicle.

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Hooker BlackHeart headers are part of a comprehensive Gen III Hemi swap system that works in combination with engine mounts, transmission crossmember, and exhaust systems. BH23104 headers are packed with value added features that will make your 1973 -1974 Mopar A-Body Gen III Hemi swap easier than ever. These headers can use popular transmissions with either driver or passenger side starters, and the starter can be installed without removing the headers, and they clear Borgeson Power steering boxes 800126 or 800127. Headers are designed for a simple installation that provides the most ground clearance possible, and clears the popular torsion bar front suspension. The 304 stainless steel hand welded construction looks great and will last a lifetime.


  • Shorty Style Gen III Hemi Swap Headers for the 1973-1974 Mopar A-Body
  • Works with Borgeson Power Steering Box When Used with 198-321 Power Steering Hardline Kit – No Other Modifications Are Required
  • Fits All Gen III Hemi Engines - 5.7L, 6.1L, 6.2L, and 6.4L
  • Works with Torsion Bar Suspensions
  • 1-3/4” 18 gauge Primaries Tubes, 304 stainless steel construction, and 100% hand welded
  • 2.5” formed collectors with 2 bolt 3/8” thick flanges
  • O2 Bungs in Both Collectors – to Support EFI Systems
  • Includes Header Bolts & Instructions
  • Works with Drivers Side or Passenger Side Starters - Left Hand Side Starter Recommended on Mopar A-Body due

About Hooker BlackHeart

The BlackHeart team utilizes the latest technology and materials to design exhaust systems, engine swap kits, and mufflers for both import and domestic cars and trucks. Hooker BlackHeart is platform-engineered to provide superb performance, aesthetics, and fitment.

Bolt SizeM8 x 1.25 x 25mm
Brand Hooker BlackHeart
Collector Diameter2.50 inch
Emission Code8
EngineGEN 3 HEMI
Header FinishNatural
Header StyleShorty
Primary Tube Dia.1-7/8 inch
Product TypeHeaders
Tube Material304 Stainless Steel
Part NumberBH23104

This product is engineered to facilitate the installation of a later model, emissions friendly engine into a vintage / classic vehicle. Federal guidelines indicate that an engine swap is allowable if one or more of the following conditions apply:

  • If there is a reasonable basis for knowing that emissions are not adversely affected as described in the EPA Tampering Policy dated November 23rd, 2020
  • The resulting vehicle is identical (with regard to all emissions related parts, engine design parameters and engine calibrations) to a certified configuration of the same or newer model year as the vehicle chassis
  • The vehicle is a uncontrolled vehicle - Vehicles that were manufactured before emission control regulations took effect are called uncontrolled vehicles. Aftermarket parts regulations and anti-tampering laws do not apply to these vehicles
  • An EO legal engine swap kit is utilized (such as a GM EROD)
  • The vehicle is being used for Competition Use Only - 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

Consumers are responsible for complying with laws prohibiting tampering, and for ensuring that modified vehicles are operated in a manner that complies with applicable laws.

Motor vehicle emissions standards are intended to help achieve and maintain air quality goals that benefit human health and the environment. The U.S. Environmental Protection Agency, the California Air Resources Board, Environment Canada, and other regulatory agencies prohibit the operation of vehicles on public roads that violate applicable emissions standards. The alteration of certified production vehicles to modify, remove, or render inoperable emissions control hardware or software, known as "tampering" is prohibited by the U.S. Clean Air Act and other laws. Tampering with motor vehicles emissions control systems is punishable by substantial monetary penalties.

Holley is committed to performance parts that allow enthusiasts to modify their vehicles and meet emission requirements. The information provided here is intended to provide general guidance of interest to most consumers. This guidance may not apply to all vehicles or all situations. It is up to each consumer to evaluate his or her own situation and take the steps necessary to comply with applicable laws. The websites listed below have more information about regulations and policies pertaining to motor vehicle emissions. You should also check the regulations applicable to your local area.

EPA Website

CARB Website

Use 198-231 Power Steering Hardline Kit with Borgeson 800126 or 800127 power steering box. Left hand side starters are recommended. Starters that mount on the right side will require modifications to the idler arm since it interferes with the starter.

*Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

Some parts are not legal for use in California or other states with similar regulations.