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Hooker BlackHeart

Hooker BlackHeart Long Tube Headers

1994-2004 Mustang LS Swap 304SS 1-7/8 X 3" Long Tube Headers

Part # 70101347-RHKR Be the first to write a review
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Hooker has quickly become the leader in LS engine swaps and we are excited to announce new products for 94-04 Ford Mustangs with GM LS engines. The new 304 stainless steel long-tube headers provide excellent ground clearance as well as component clearance. Their 3" formed merge collectors with spears maximize flow potential, improving engine performance. These headers are designed to work specifically with Hooker Transmission Crossmembers (P/N 71222012HKR or 71222013HKR) and Engine Mounts (P/N 71221013HKR for 94-95 Cars or 71221011HKR for 96-98 Cars) for a trouble free install.


  • Compatible with the stock OE K-member or other aftermarket tubular K-members that replicate the stock engine offset.
  • Designed to work specifically with Hooker Transmission Crossmembers (P/N 71222012HKR or 71222013HKR) and Engine Mounts (P/N 71221013HKR or 71221011HKR) for a trouble free install
  • Compatible with all GM automatic and TREMEC manual transmissions
  • Lightweight, 18-gauge, 304 stainless steel construction maximizing strength and durability
  • Available with 1-3/4” or 1-7/8” primaries to cover a wide range of horsepower levels
  • Long transition 3” diameter collectors feature merge spears for maximum flow and increased exhaust velocity
  • All hardware included
  • Quality welds for strength, longevity and good looks
  • Tube geometry designed for maximum clearance and hassle-free installation
  • 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.

Bolt SizeM8 x 1.25 x 25mm
Brand Hooker BlackHeart
CARB (California) CompliantNo
Collector Diameter3.00 inch
Emission Code4
EngineGM Small Block Gen III/IV (LS Based)
Header FinishNatural
Header StyleLong Tube
K-Member CompatibilityAJE (MU-40-UM)
Maximum Motorsports (MMKM-1)
Maximum Motorsports (MMKM-2)
Material304 Stainless Steel
Primary Tube Dia.1-7/8 inch
Product TypeHeaders
Tube Material304 Stainless Steel
Type of ComponentHeaders
Part Number70101347-RHKR

This part is legal for sale or use on Racing Use Only Vehicles

The following vehicles are considered Racing Use Only Vehicles:

  • 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

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle


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    *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.

     X  Holleydays 2021
     X  Holleydays 2021