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Hooker Exhaust Manifolds

GM LS Exhaust Manifolds w/ 2.25" Outlet - Black Ceramic Finish

PART# 8501-3HKR

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Not compatible with 2004-2006 GTO starters/bellhousings. Although designed as a stock replacement, this product does not have a C.A.R.B. Executive Order Exemption and therefore may or may not be legal for any particular pollution controlled application. Check with your state or local governmental authority regarding approval for your application. Have been validated thus far for fitment on 1970-81 GM F-bodies, 82-88 GM G-bodies and 68-72 GM A-bodies.

Overview

Hooker cast iron exhaust manifolds have been designed to hug close to the engine block so they fit into a wide variety of replacement and engine-swap applications. Their contoured design aims the exhaust directly at the exit port for improved flow. Being cast iron means they will provide years of leak-free performance with less under hood noise than traditional headers. Plus, their shorty design means you can route exhaust tubing close to your frame/floor pan for maximum ground clearance. "Hook" up your GM LS engine with Hooker cast iron manifolds today!

Features:

  • Intended for all GM LS (except LS7 and LS9) engine swap applications where durability, quiet operation, emissions compliance and leak-free sealing is desired
  • Available in plain as-cast finish or with various Hooker ceramic coatings for reduced engine compartment temps and improved corrosion resistance
  • 304 stainless steel mating flanges included (mating flange fasteners are not included)
  • 2.25-inch outlet diameter
  • 2 bolt exit flange configuration matches 2010 Camaro (also the same as the E-rod exhaust manifolds) which can be used with OE gaskets and fasteners if desired, for an OE quality seal
  • Cast from Hi-Silicon-Moly Ductile Iron to provide durability and corrosion resistance
  • Free-flowing for good performance and catalytic converter efficiency
  • Tight tuck design provides universal fit for most popular chassis and a clean traditional muscle car appearance - ideal for GM E-Rod installations
  • Recommended for strong performance on engines making up to 500 horsepower (For optimum high rpm performance see Hooker long tube engine swap headers)
  • Perfect complement to Hooker engine swap mount plates and Holley engine swap oil pans

Specs

BrandHooker
Collector Diameter2-1/4 inch
Emission Code4
Header FinishBlack Ceramic
Header StyleManifold
Primary Tube Dia.1-5/8 inch
Product TypeExhaust Manifolds
Tube MaterialCast Iron
Part Number8501-3HKR

Emissions

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

Not compatible with 2004-2006 GTO starters/bellhousings. Although designed as a stock replacement, this product does not have a C.A.R.B. Executive Order Exemption and therefore may or may not be legal for any particular pollution controlled application. Check with your state or local governmental authority regarding approval for your application. Have been validated thus far for fitment on 1970-81 GM F-bodies, 82-88 GM G-bodies and 68-72 GM A-bodies.

Applications

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        Some parts are not legal for use in California or other states with similar regulations.

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