Hooker Blackheart Gen III Hemi Swap Mid-Length Headers

Fits 1973-1974 Chevrolet C10 / GMC C15 with Gen III Hemi Swap

Part # BH2390
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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 Gen III Hemi swap headers are part of a fully engineered swap system that provides maximum component clearances, ideal drive train geometry & clearance for a 3.00" exhaust system. These headers fit the 1973-1974 Chevrolet C10/GM C150 2WD trucks with the Gen III Hemi swap and correct directly to BH14308 or BH14309 exhaust systems. These high-quality mid-length swap headers are made from 304 stainless steel and feature 3/8" thick header flanges, 18-gauge 1-7/8" primary tubes, and 3.00" collectors (w/ merge spears). Headers provide clearance to the brake booster, steering shaft, power steering box, starter (both left & right side-mounted), rear sump oil pan, and several automatic & manual transmissions options.


  • Gen III Hemi swap headers were designed specifically for the 1973-1974 Chevrolet C10/GMC C15 2-wheel-drive trucks
  • Easy bolt-on installation with direct fitment to BH14308 (2.5-inch) or BH14309 (3-inch) dual exhaust systems
  • Fits 1973-1974 C10/C15 2-wheel drive truck w/ Gen III Hemi engines 2003 & Up 5.7L/6.1L/6.2L/6.4L
  • Tube geometry designed for maximum clearance & hassle-free installation
  • Headers are geometrically/functionally compatible with the following transmissions – Automatic Transmissions: A727, 46RE, 46RH, 545RFE, NAG1, 8HP70 & Manual Transmissions: Tremec TR6060, and TKX (Ford)
  • Constructed Form lightweight 18-gauge, mandrel bent 304 stainless steel for strength, durability & corrosion resistance
  • 3/8" thick, CNC waterjet cut header flanges – For strength and maximum sealing surface
  • 1-7/8" primary tubes w/ long transition 3-inch collectors w/ merge spears for maximum flow and increased exhaust velocity
  • O2 bungs in both collectors – eliminates header modifications for oxygen sensors
  • 100% quality hand-welded construction for strength, longevity & good looks
  • Includes headers, attaching hardware & instructions
  • Manufacturer's limited lifetime warranty

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.

Brand Hooker BlackHeart
Collector Diameter3.00 inch
Emission Code8
EngineGEN 3 HEMI
Header FinishNatural
Header StyleMid Length
Primary Tube Diameter1-7/8 inch
Product TypeHeaders
Tube Material304 Stainless Steel
Part NumberBH2390

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

Requires BHS561 Engine Mounting Brackets Requires BHS562 Transmission Crossmember and Appropriate Adapter for Desired Transmission (sold separately) 2003-2008 5.7L Hemi Engines use w/ Header Gaskets 7594 (or Mopar #'s 53013943AA & 53013944AA) 6.1L, 6.2L, 6.4L, and 2009-Up 5.7L Hemi Engines use w/ Header Gaskets 7595 (or Mopar #'s 05038098AA & 05038099AA)

*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.