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Hooker BlackHeart Shorty Header

1991-1999 Jeep Wrangler YJ/TJ L6, 4.0L 1-1/2 Stainless Steel Shorty Header - Natural Finish

PART# 70305403-RHKR

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Hooker continues to push the boundaries of performance with the BlackHeart line of exhaust products. We are proud to offer this shorty header for 1991-99 Jeep Wrangler YJ/TJ vehicles. This header is engineered to offer both premium fitment and maximum performance from your 4.0L L6 engine.


  • Max dyno gains of +4.22 HP & +7.04 LB.FT torque
  • 1-1/2” diameter tuned length primary tubes feature smooth transition, 6-2-1 design for increased exhaust flow, improved throttle response and a broad torque curve
  • Utilizes true mitered merge collectors designed to maximize exhaust velocity and scavenging for optimum performance
  • Constructed from heavy duty 14-gauge, stainless steel for increased strength and durability
  • Uses 1/2" thick head flange for durability and an optimum sealing surface
  • Retains factory O2 sensors and catalytic converters
  • 100% bolt-on with NO cutting necessary for a hassle-free installation
  • Quality welds for strength, longevity and good looks
  • Premium header gasket included
  • Manufacturer's limited lifetime warranty


Application1991-1999 Jeep Wrangler YJ/TJ 4.0L
BrandHooker BlackHeart
Emission Code7
Exhaust SeriesHooker BlackHeart
Header FinishNatural
Header StyleShorty
Primary Tube Dia.1-1/2 inch
Product TypeHeaders
Tube Material304 Stainless Steel
Part Number70305403-RHKR



This part is legal under the provisions of EPA’s memorandum 1A. The company has reasonable basis (test results) to verify that this product allows the vehicle to operate within legal emissions standards and is therefore legal to be sold for on-street use in all states that accept the legal provisions of the Clean Air Act and EPA Memorandum 1A. This product is NOT LEGAL FOR SALE OR USE IN THE STATE OF CALIFORNIA. Testing with the California Air Resources Board, in order to achieve 50-state compliance, is pending with CARB. Once testing is complete with California, and an E.O. number is issued, this product will be updated to 50-state legal status.

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

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