Competition Headers 265-400 Chevy Small Block V8
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HOOKER HEADERSPART NUMBER: 520-2451-3

Competition Headers 265-400 Chevy Small Block V8

$84995
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Chevy/GM Car Chevy Small Block
    Competition Headers
  • 265-400 Chevy Small Block V8
  • 1967-81 Camaro/Firebird
  • 1964-87 Chevelle/El Camino
  • 1970-87 Monte Carlo
  • 1968-79 Nova
  • 1.625'' x 30'' Primary Tubes
  • 3'' x 8'' Collector
  • "Darksides" Black Ceramic Coated

    Applications Continued:
  • 1978-87 G-Body
  • 1965-89 Full Size Car

    Footnotes:
  • Designed for stock heads with factory straight plugs (4-1/2" plug spacing).
  • Will not fit angle plug heads.
  • Complete exhaust systems can be fabricated using Hooker Mufflers.
  • A/C Requires bracket 520-10925 drivers side or 520-10926 passenger side. 1979 and later with short compressor use stock brackets.
  • Applications with oxygen sensors use 555-30012 for 3' three bolt flange.
  • The #1 tube (front drivers) has a small dent for spark plug and spark plug wire clearance.

    Accessory Compatibility:
  • Alternator/Generator - Yes, except short water pump engines with drivers side mount will require 520-10927 and 520-10928
  • Power Steering - Yes
  • Power Brakes - Yes
  • Air Conditioning - Yes, may require brackets listed above
  • Smog Pump - Requires modifications

    Transmission Compatibility:
  • Manual Column Shifter - Yes if equipped
  • Manual Floor Shifter - Yes if equipped
  • Automatic Column Shifter - Yes if equipped
  • Automatic Floor Shifter - Yes if equipped

    Included Items Note: Bolts and Gaskets Included, Reducers required

    Port Shape: SAP

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

All Budget Headers are NOT Created Equal!
Hooker's Competition Series Headers come in your choice of finishes and are engineered to perform at a reasonable price! To let your engine really breathe, Hooker utilized 16 gauge (.049'' thick) steel tubing attached to long transition style collectors. Giving you a serious increase in flow over other brand headers without a loss in the backpressure most engines need to perform! After years of testing, Hooker has discovered that a machined 5/16'' header flange offers enough flex to hold the gasket tight to each exhaust port plus enough rigidity to keep everything properly tied together.

Show MoreFeatures
  • Mandrel-bent tuned-length tubing for smooth exhaust flow and power
  • Sturdy 16 gauge steel tubing
  • Perfect seal 5/16'' machined header flanges
  • Long transition collector for improved power over standard headers
  • Gaskets and bolts included (Reducers sold separately)
  • Available in five finishes to suit your needs (see listings below for product availability) -

    Black Painted (Part numbers do not have a suffix)

    Metallic Ceramic Coating (Part numbers have a -1 suffix)

    Stainless Steel (Part numbers have a -2 suffix)

    "Darksides" Black Ceramic Coating (Part numbers have a -3 suffix)

    Titanium Ceramic Coating (Part numbers have a -4 suffix)
Part TypeHeader
Product LineHooker Headers Competition Headers Chevy/GM Car
BrandHOOKER HEADERS
Package Height9.0
Package Width18.0
Package Length39.0
Weight39.35 PG
Part CategoryPerformance Parts
Header FinishBlack ceramic coated
Tube DirectionDown Swept
Bolts/Studs IncludedYes
Cylinder Head Port ShapeOval
Transmission Mount IncludedNo
Gaskets IncludedYes
TunedNo
Motor Mounts IncludedNo
Primary Tube Gauge16-gauge
Header StyleFull-length
Cross Over Pipe IncludedNo
Primary Tube Length30 in (762 mm)
QuantitySold as a pair
Header MaterialSteel
Tube Material304 Stainless Steel
Weld-UpNo
Collector Attachment3-bolt flange
Flange StyleStandard
Collector Diameter3 in (76.2 mm)
Part FitmentSemi Universal
Reducers IncludedNo
ApplicationAutomotive
Catalytic Converter(S) IncludedNo
Primary Tube Diameter1.625 in (41.3 mm)
Vendor Part Number2451-3HKR
Package Qty1
Package TypeEA

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