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Hooker Blackheart BH2486 Exhaust System Adapter Kit - 2.5 inch diameter - 409SS

Compatible with 1973-1974 Chevrolet® C10 and GMC® C15 2WD Short Bed Truck with Gen III Hemi® Engine. This product is not created or sold by GM®. Sold as a Kit.

Part # BH2486 Be the first to write a review

Hooker Blackheart BH2486 Exhaust System Adapter Kit - 2.5 inch diameter - 409SS

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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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These adapters connect Hooker Blackheart Gen III Hemi cast iron manifolds BHS558, BHS559, BH560 (or log header BH2375) to swap exhaust system BH14308. The adapter pipes are required to fill that gap between the end of the manifolds and the exhaust system (since the exhaust system is designed to fit directly to mid-length headers BH2390). The adapter kit includes 409 stainless steel downpipes, gaskets, and bolts for a simple bolt-in connection.


  • Connects Hooker Gen III Hemi Cast iron exhaust manifolds to 1973-1974 C10 Gen III Hemi 2.5-inch swap exhaust
  • 409 stainless steel construction – for strength and corrosion resistance
  • Oxygen sensor bungs in each downpipe – to support EFI systems
  • Easy bolt-in installation with Gen III Hemi exhaust manifolds (BHS558, BHS559, BHS560) or log header BH2375 and BH14308 exhaust system
  • Compatible with Gen III Hemi swap system for C10/C15
  • Includes gaskets and bolts
Brand Hooker Blackheart
Emission Code8
Engine FamilyChrysler Gen III Hemi
Exhaust SeriesBlackheart
Gaskets IncludedYes
Inlet Diameter (in)2.5
Material409 Stainless Steel
Product TypeExhaust Adapter Pipes
QuantitySold as a Pair
Tubing Diameter (in)2.5"
Manufacturer Part NumberBH2486
California Proposition 65 Chemical NameChromium (hexavalent compounds)
California Proposition 65 Chemical Name 1Nickel (metallic)
Part NumberBH2486

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.

Supershops 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

Fits short-bed regular-cab RWD trucks with standard-duty rear leaf springs only (52" length), and cannot be installed on trucks equipped with factory heavy-duty rear leaf spring option (56" length).

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    *Free Shipping & Handling only offered to the contiguous US on orders over $149, excludes clearance parts and oversized packages.

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