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Hooker Competition Long Tube Headers - Painted

Part # 2458HKR Be the first to write a review

1955-1957 Chevy: 265-400, Tube Size 1.6250" x 30" O.D. Collector Size 3" O.D., Collector Length 8", Port Shape: Round Port,

Hooker Competition Long Tube Headers - Painted

Estimated Ship Date: 07/10/2026
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3

Emissions

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.

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Hooker Competition headers offer the best value in the high performance header market. Designed for the value-conscious buyer, Hooker Competition headers offer premium features at a very competitive price. Made of durable 16 gauge mild steel tubing, the Hooker Competition header design utilizes a long transition collector to reduce back pressure and increase exhaust flow. A perfect sealing surface is assured with the 5/16" machined flanges, with welded O-ring seals. Experience has proven that this flange size is ideal to maintain header integrity and be pliable enough to seal each exhaust port. Tubing is mandrel-bent to maintain metal strength and provide consistent tube diameter at radii to maximize performance. Hooker Competition headers have a standard finish that features a heat-cured, high-heat-resistant paint. Optionally, the famous Hooker Ceramic Thermal Barrier Coating is available.

Features:

  • Tuned-length primary tubes for better performance
  • Mandrel-bent tubing for smooth exhaust flow
  • Light weight & sturdy 16 gauge tubing
  • Long transition collector for decreased back pressure
  • 5/16” machined flanges for a perfect seal
  • Industry’s best welds for durability
  • designed for easy, trouble-free fit
  • All necessary hardware included for a complete installation
  • Works with factory power steering and power brakes

About Hooker

Hooker Headers & exhaust systems are engineered to increase horsepower and torque while improving throttle response. Shop the official site of Hooker at Holley.com.

Air Injection TubesNo
Bolt Size3/8-16 x 3/4 IN
Bolts IncludedYes
Brand Hooker
California Proposition 65Yes
California Proposition 65 Chemical ListChromium
Nickel
CARB (California) CompliantFor Pre-1975 Vehicles only
CategoryExhaust
Collector Attachment3-Bolt Flange
Collector Diameter3.00 IN
Collector Reducer IncludedNo
Collector Reducer Outlet DiameterN/A IN
ColorBlack
DesignLong Tube
Drive2WD
EGT PortNo
Emission Code3
EngineChevrolet Small Block Gen I
FinishPainted
Flange Thickness5/16 IN
Gasket Or Seal IncludedYes
Grade TypePerformance
Header SeriesCompetition
Header StyleLong Tube
MaterialMild Steel
Mounting Hardware IncludedYes
Oxygen Sensor PortNo
Part TypeExhaust Header
Port ShapeOval
Primary Tubing Diameter1 5/8 IN
1.625 IN
Product TypeHeaders
QuantitySold as a Pair
Sub CategoryExhaust Manifolds
Tube Wall Thickness16 GU
UPC700414008332
Part Number2458HKR
3

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.


The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle


WARNING: It is against the law to install this part on an Emissions Controlled Vehicle


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
Instructions - 2458hkrrev1.pdf
Will not fit on convertible models. Will not fit with angle plug heads or raised port heads. Will only fit with block mounted starter. Will not accommodate 605 gear box. Breaking in an engine with ceramic coated headers WILL result in damage to the coating and will VOID all warranties. Ceramic coated headers require several heat cycles to fully cure before they will withstand extreme heat. Hooker recommends using cast iron exhaust manifolds or old headers to break in new engines to avoid coating damage. Please call Hooker tech service at 270-781-9741 for additional information regarding ceramic coated exhaust products. The use of header wraps can cause the header tubes to crack or rust due to excessive heat and moisture build-up. Hooker does not recommend the use of header wraps as this will void the warranty. Hooker long tube headers do not come with header reducers.

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