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Holley Kits

Hooker Blackheart GM LS Exhaust Swap Kit

1997-2006 Jeep Wrangler TJ GM LS Engine Swap Exhaust Kit. Includes 304 Stainless Steel Swap Headers, Y-Pipe, and 3 Inch High-Tuck Exhaust System with Muffler

Part # VK090237
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This product is engineered to facilitate the installation of a later model, emissions friendly engine into a vintage / classic vehicle.

See Emissions Details
Finish off your swap with a high quality exhaust system for the 1997-2006 Jeep Wrangler TJ. The system is designed to work with GM LS engine swaps. This 3" system is designed to be compatible with any stock type rear suspension system, bigger wheel and tire assemblies and/or bolt-on lift kits. For off-road enthusiasts, the high-tuck design will clear any obstacles you choose to tackle, but is still big enough for V8 performance. With a mellow tone at idle and an aggressive note under acceleration, it will be hard to hide the extra power you have.


  • Complete Exhaust System Designed Specifically for Jeep Wrangler TJ with GM LS Engine Swap
  • 3” Diameter Tubing – Increased Exhaust Flow Capacity for V8 Engine Swaps
  • Tight-tucked Tip Exit Location Improves Functional Off-Road Clearance
  • Designed for use with Stock, or Lifted Stock Rear Suspension Systems
  • Made from Lightweight 18-Gauge Mandrel Bent 304 Stainless Steel – for Strength & Durability
  • 100% Quality Hand-Welded for Strength, Longevity & Good Looks
  • Uses Factory Mounting Points for Factory like fitment
  • Tube Geometry Designed for Maximum Clearance & Hassle-Free Installation
  • All Hardware Included
  • Manufacturer’s Limited Lifetime Warranty
Brand Holley Kits
Emission Code8
Exhaust SeriesHooker BlackHeart
Exit PositionSingle Rear Exit
Inlet Diameter (in)3
Material304 Stainless Steel
Muffler Quantity1
Outside Diameter (in)3
Product TypeExhaust Systems / Kits
Single DualSingle
Sound LevelAggressive / Moderate
System TypeExhaust System / Kit
Tubing Diameter (in)3
Part NumberVK090237

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

*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.