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Hooker Blackheart 2.5" Stainless Steel Natural Cast LS Swap Exhaust Manifold - 8503HKR
Hooker Blackheart 2.5" Stainless Steel Natural Cast LS Swap Exhaust Manifold - 8503HKR - Image 4 Hooker Blackheart 2.5" Stainless Steel Natural Cast LS Swap Exhaust Manifold - 8503HKR - Image 2 Hooker Blackheart 2.5" Stainless Steel Natural Cast LS Swap Exhaust Manifold - 8503HKR - Image 3 Hooker Blackheart 2.5" Stainless Steel Natural Cast LS Swap Exhaust Manifold - 8503HKR - Image 4
Hooker Blackheart now offers stainless steel versions of our popular cast iron lineup of LS swap exhaust manifolds based on the 8502HKR and family. The new stainless steel manifolds offer a number of advantages over the cast iron version, including increased durability, reduced weight, and improved corrosion resistance. The shorty tight tuck design means you can route exhaust tubing close to your frame|floor pan for maximum ground clearance. These are available in both natural cast and polished depending on the look you're going for and all hardware is included (gaskets, bolts, and flanges).

Features:
  • 2.5-inch outlet diameter offers improved flow for maximum performance from a cast exhaust manifold
  • Tight tuck design provides universal fit for most popular chassis and a clean traditional muscle car appearance
  • Intended for GM LS engine swap applications where durability, quiet operation, and leak-free sealing is desired
  • Plain as-cast finish for a factory appearance. Also available in polished.
  • Nickel plated steel mating flanges, MLS mating flange gaskets, and mating flange hardware included
  • Stainless Steel construction to provide unmatched durability and corrosion resistance
  • Perfect complement to Hooker engine swap mount plates and Holley engine swap oil pans
Specifications:
  • Application: Multi-fit
  • Bolt Size: M8 x 1.25 x 25mm
  • Brand: Hooker BlackHeart
  • Choose Your Part: Manifold
  • Collector Diameter: 2.50 inch
  • Emission Code: 8
  • Engine: GM Small Block Gen III/IV (LS Based)
  • Exhaust Series: Hooker BlackHeart
  • Finish: Natural
  • Header Style: Manifold
  • Material: Stainless Steel
  • Primary Tube Dia.: 1-3/4 inch
  • Product Type: Manifold
  • Tube Material: Stainless Steel
  • Type of Component: Manifold
  • UPC: 090127475737
  • Part Number: 8503HKR
Install Instructions:Fitment:
  • GM LS Small Block Gen III/IV
Note:
  • Not compatible with 2004-2006 GTO starters|bellhousings.


Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Hooker Banner

Who is Hooker Headers?

Hooker Headers is a company founded by Gary Hooker in 1962. It started when he decided to design a header for his 409 Chevrolet. Soon after, he realized a demand for headers in his area and decided to produce them commercially. Starting with a few employees in a building in South Ontario, CA, Hooker Headers was born.

Simple Yet Effective Design

The company’s philosophy is simple, to produce a header design that would make real and usable power by balancing the exhaust and intake pressure waves. It allows the engine to expel the burnt gas and draw in air for a better fuel and air mixture. This philosophy is evident to all of their products, making them one of the most sought-after brands.

Racing Heritage

During the 1960s and 1970s, Hooker Headers dominated the drag racing scene as almost all of the NHRA Pro Stock cars are using Hooker Headers. It is also used by legendary racers Bill “Grumpy” Jenkins, Sox & Martin, and Bob Glidden and was a regular during their campaigns. Up to this day, Hooker Headers holds the claim of the winningest header in drag racing history.

Purchase Hooker Header At Vivid Racing

If you are in the market for a high-quality exhaust system for your vehicle, Hooker Headers is the brand for you. They lead the way when it comes to header designs and technology and is used by many racers and enthusiasts worldwide. For almost 60 years, they have consistently provided their customers with the best products that satisfy their optimum performance needs. To know more about Hooker Headers, visit Vivid Racing and check out their list of products that fit your specific requirements.

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Things
Sale price None
Wholesale price $552.19
Shipping Weight: 26.80
Length: 21
Width: 9
Height: 12
Product Added At Tuesday 27 June, 2023
Product Modified At Thursday 10 July, 2025
Imported By ETLOverride
Last Edited By vendordata@vividracing.com
View In Admin

Emissions Info
Carb Approved No
Carb Number -
Epa Status -
Prop65 -
Carb Required -
Vendors
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Vendor Inv Cost Retail Jobber MAP Core Updated
Holley Performance Products Inc. $467.96 $674.95 ? $599.95 ? 2025-07-10 19:13:18


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