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Hooker BlackHeart Header Back Exhaust System

1978-1987 GM G-Body - 2.5 inch, Natural Finish Stainless Steel

PART# 70501363-RHKR

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$837.00   Suggested Retail
$752.95   Your Price
Estimated shipping date: 02/23/2021
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Aggressive to moderate sound


Full stainless steel exhaust system comes complete with stamped crossover for a broad torque curve, TIG welded stainless steel straight through designed absorption style mufflers, for applications up to 450HP; single turn-down exit under each quarter panel for an stealthy look.


  • Each system is supplied with a high-efficiency stamped crossover & high-flow TIG-welded 304 SS absorption mufflers
  • OE quality hardware (clamps, hanger rods and rubber isolators) provided to ensure excellent fitment and a leak free installation
  • Kits are supplied with turn-down style exits under the rear quarter panels
  • Stainless steel straight through designed absorption mufflers for a muscle car sound without the resonance
  • Constructed of mandrel bent stainless steel tubing
  • *Fits All Except EL Caminos-118 Wheelbase


BrandHooker BlackHeart
Emission Code4
Exhaust SeriesHooker BlackHeart
Exit PositionDual Out Side
Inlet Diameter (in)2.5
Material304 Stainless Steel
Muffler Quantity2
Outlet Diameter (in)2.5
Product TypeExhaust System
Single DualDual
Sound LevelAggressive / Moderate
System TypeHeader-back
Tube Diameter2.5 inch
Tubing Diameter (in)2.5
Part Number70501363-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

Tech Resources

*Fits All Except EL Caminos-118 Wheelbase Connects to 2480HKR mid-length headers with adapter P/N 42112HKR Connects to 2332HKR and 2333HKR full-length headers with adapter P/N 42118HKR Connects to 8501HKR exhaust manifolds with adapter P/N 42114HKR


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