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

Competition Headers 265-400 Chevy Small Block V8

$76395$849.95You Save$86.00
1 left in stock
ShippingShips Today
Lowest PriceLowest Price Guarantee

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
No Questions
No Reviews

Items You Need

Exhaust Header Gaskets for Small Block Chevy and Vortec

JEGS

Exhaust Header Gaskets for Small Block Chevy and Vortec

Part Number : 555-210050
$1997$23.99
You Save$4.02
Copper Exhaust Gaskets 1955-1995 Small Block Chevy [Square Port]

JEGS

Copper Exhaust Gaskets 1955-1995 Small Block Chevy [Square Port]

Part Number : 555-210055
$4599$49.69
You Save$3.70
Steel Reducers without O2 Fittings [3 in. Collector to 2 1/4 in. O.D.]

JEGS

Steel Reducers without O2 Fittings [3 in. Collector to 2 1/4 in. O.D.]

Part Number : 555-30003
$3199$35.99
You Save$4.00
Steel Reducers without O2 Fittings [3 in. Collector to 2 1/2 in. O.D.]

JEGS

Steel Reducers without O2 Fittings [3 in. Collector to 2 1/2 in. O.D.]

Part Number : 555-30004
$3199$35.99
You Save$4.00
30005 - Steel Reducers without O2 Fittings [3 in. Collector to 3 in. O.D.]

JEGS

30005 - Steel Reducers without O2 Fittings [3 in. Collector to 3 in. O.D.]

Part Number : 555-30005
$3499$38.99
You Save$4.00
3" Copper Collector Gaskets & Bolt Kit

JEGS

3" Copper Collector Gaskets & Bolt Kit

Part Number : 555-30701
$2698$29.99
You Save$3.01
3/8"-16 Header Bolt Kit, Hex Head, 3/4" Long for AMC, Chevy and Ford

JEGS

3/8"-16 Header Bolt Kit, Hex Head, 3/4" Long for AMC, Chevy and Ford

Part Number : 555-30711
$969$10.59
You Save$0.90
Exhaust & Header Wrap 2 in. x 50 ft. x 1/16 in. Thick

JEGS

Exhaust & Header Wrap 2 in. x 50 ft. x 1/16 in. Thick

Part Number : 555-32057
$4899$53.99
You Save$5.00
Exhaust & Header Wrap 1 in. x 50 ft. x 1/16 in. Thick

JEGS

Exhaust & Header Wrap 1 in. x 50 ft. x 1/16 in. Thick

Part Number : 555-32062
$2799$30.79
You Save$2.80
Spark Plug Wire Boot Guards, Black [Set of 8]

JEGS

Spark Plug Wire Boot Guards, Black [Set of 8]

Part Number : 555-40300
$4499$49.99
You Save$5.00
Spark Plug Wire Boot Guards, Red [Set of 8]

JEGS

Spark Plug Wire Boot Guards, Red [Set of 8]

Part Number : 555-40302
$5499$60.99
You Save$6.00
Spark Plug Wire Boot Guards, Blue [Set of 8]

JEGS

Spark Plug Wire Boot Guards, Blue [Set of 8]

Part Number : 555-40304
$5499$60.99
You Save$6.00
Spark Plug Wire Boot Guards, Silver [Set of 8]

JEGS

Spark Plug Wire Boot Guards, Silver [Set of 8]

Part Number : 555-40310
$4499$49.99
You Save$5.00
Header Bolt Kit Small Block Chevy

ARP

Header Bolt Kit Small Block Chevy

Part Number : 070-100-1101
$2399
Header Bolt Kit Small Block Chevy

ARP

Header Bolt Kit Small Block Chevy

Part Number : 070-100-1201
$1999
Header Bolt Kit Small Block Chevy

ARP

Header Bolt Kit Small Block Chevy

Part Number : 070-400-1101
$2499
Header Bolt Kit Small Block Chevy

ARP

Header Bolt Kit Small Block Chevy

Part Number : 070-400-1201
$2499
3-Bolt Flanged Reducers

HOOKER HEADERS

3-Bolt Flanged Reducers

Part Number : 520-11030
$7100$78.89
You Save$7.89
3-Bolt Flanged Reducers

HOOKER HEADERS

3-Bolt Flanged Reducers

Part Number : 520-11032
$6692$74.35
You Save$7.43
3-Bolt Flanged Reducers

HOOKER HEADERS

3-Bolt Flanged Reducers

Part Number : 520-11040
$6260$69.55
You Save$6.95
3-Bolt Flanged Reducers

HOOKER HEADERS

3-Bolt Flanged Reducers

Part Number : 520-110401
$16915$187.95
You Save$18.80
Some parts are not legal for use in California or other states with similar laws / regulations
p65 warning
Your Cart

Your shopping cart is empty!