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Hooker BlackHeart LS Swap Mid-Length Headers - Stainless

1978-88 GM A/G-Body (Monte Carlo/Malibu/El Camino/Cutlass/Grand Prix/Regal/Bonneville), Mid-Length LS-Swap, 1-3/4", Collector Size 2-1/2"

PART# 70201303-RHKR

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Hooker continues to set the standard of performance with the Blackheart line of engine swap system components. We are proud to offer these 304 stainless steel mid-length LS swap headers for 1978-1988 GM A/G-body vehicles. These headers feature 1-3/4" primary tubes with 2-1/2" collectors (70201303-RHKR), or 1-7/8" primaries with 3" collectors (70201304-RHKR). They are engineered for bolt-in compatibility with all other Hooker Blackheart LS swap components for the 1978-1988 GM A/G-body platform.


  • Comprehensively designed as part of the Hooker Blackheart 1978-1988 GM G-body LS engine swap system; Designed for use with 12643HKR engine mounting brackets and 12644HKR transmission crossmember
  • Geometrically/functionally compatible with GM TH350, TH400, 700R4, 2004R, 4L60-4L70 and 4L80E/4L85E* transmissions
  • Available with 1-3/4” primary tubes and 2.5” collectors (70201303-RHKR), or 1-7/8” primary tubes and 3” collectors (70201304-RHKR)
  • Long Transition header collectors feature merge spears for maximum flow and increased exhaust velocity
  • Constructed from lightweight, 18-gauge, mandrel bent, 304 stainless steel maximizing strength and durability
  • 3/8” thick, CNC waterjet header flanges are used for strength and maximum sealing surface
  • 100% quality hand-welded construction for strength, longevity and good looks
  • Tube geometry designed for maximum clearance and hassle-free installation
  • All hardware included
  • Manufacturer’s limited lifetime warranty


BrandHooker BlackHeart
Collector Diameter2.50 inch
Emission Code4
EngineGM LS
Header FinishNatural
Header StyleMid Length
Material304 Stainless Steel
Primary Tube Dia.1-3/4 inch
Product TypeHeaders
Part Number70201303-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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