Hooker BlackHeart Shorty Header – Stainless Steel

91-99 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 Code3
Header FinishNatural
Header StyleShorty
MaterialStainless Steel
Primary Tube Dia.1-1/2 inch
Product TypeHeaders
Part Number70305403-RHKR


This part is legal for use on Uncontrolled (Non-Emissions Controlled) Vehicles or Racing Vehicles.

The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle

Racing Vehicles are vehicles that are used exclusively for racing or other forms of competition that are not registered and that may never be used on the street.


*Free Shipping & Handling only offered to the contiguous US on orders over $100.

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