2005-2009 Mustang GT 4.6L V8 Cat-Back W/O MufflersYouTube Button

Hooker BlackHeart Cat-Back Without Mufflers

2005-09 Mustang GT v8 4.6L, 3” 304 Stainless Steel Cat-Back Exhaust without Mufflers

PART# 70503337-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 these cat-back exhaust systems for 2005-09 Mustang GT vehicles. These 3" cat-backs are engineered to offer both premium fitment and maximum performance from your 4.6L engine.


  • Up to 30% weight savings over OE exhaust, a savings of 14LBS.
  • Constructed from 3” lightweight, 18-gauge, mandrel bent, 304 stainless steel maximizing strength and durability
  • Also available in a dual, polished stainless steel, high-flow straight through muffler design (pn 70403338-RHKR)
  • 4” Dual-wall, angle-cut, polished 304 stainless steel tips with laser etched Hooker BlackHeart logos add Maximum style to your ride
  • 100% quality hand-welded construction for strength, longevity and good looks
  • Utilizes OEM mounting points for factory-like fitment
  • Tube geometry designed for maximum clearance and hassle-free installation
  • All hardware included
  • Manufacturer’s limited lifetime warranty


Application2005-2009 Mustang GT V8, 4.6L
BrandHooker BlackHeart
Emission Code1
Material304 Stainless Steel
Muffler TypeNone
Product TypeCat-Back Exhaust Kit
Tube Diameter3"
Part Number70503337-RHKR


This part is legal for use on Emissions Controlled Vehicles when used in accordance with the manufacturers application guide because it has a California Air Resources Board Executive Order number or is a direct or consolidated replacement part.

The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle
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      Some parts are not legal for use in California or other states with similar regulations.