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  • Chevy Big Block Performance Aluminum Cylinder Head - Pair
Chevy Big Block Performance Aluminum Cylinder Head - Pair
Chevy Big Block Performance Aluminum Cylinder Head - Pair
Chevy Big Block Performance Aluminum Cylinder Head - Pair
Chevy Big Block Performance Aluminum Cylinder Head - Pair
Chevy Big Block Performance Aluminum Cylinder Head - Pair
Chevy Big Block Performance Aluminum Cylinder Head - Pair
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Chevy Big Block Performance Aluminum Cylinder Head - Pair

SKU: CyHdBr-CBB-AP-320128

Availability: Out of Stock

Product type: V8 Performance

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Order in the next 0 hours 0 minutes to get it by         /11/2026

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PRODUCT INFORMATION
Technical Data & Specifications
Makes & Models
Product FAQ
PRODUCT INFORMATION

New cylinder head suitable for
Chevrolet Big Block

Build

  • Bare Cylinder Head - valve seats, guides and/or pre-combustion chambers installed. Where applicable rocker pedestals, camshaft caps/cradle installed and line bored (refer to image) - ready for assembly, no assembly parts included
  • Semi-Assembled A - built from valves up to springs (refer to image) - requires further assembly parts to be installed before installation
  • Semi-Assembled B - built from valves up to springs including guide plate and studs - requires further assembly parts to be installed before installation

Models

  • 396
  • 427
  • 454
  • 502

Technical Data

  • Intake: 320cc
  • Exhaust: 128cc
  • Chambers: 115cc
  • Stud Base Thread Drilled:  .44"
  • Plug:
    • Angle
  • Valve Guides: Bronze Manganese
  • Valve 3  Angle  Job
  • Suitable Valve Details
    • Intake Valves: 2.25"
    • Exhaust Valves: 1.88"
    • Valve Stem Diameter: 11/32" /  0.3415"
Assembled Heads:
    • Valves: Stainless Steel
      • Height: Standard + .100"
    • Spring including dampener
      • CFM Intake Long Runner at .600 320.6 CFM
      • CFM Intake Short Runner at .600 317.0 CFM
      • CFM Exhaust at .600 232.9 CFM
      • Guides & Studs NOT Included

Part Numbers
OEM Number: ###
Cross Reference: ###
Other Codes: ###

Images are for illustration purposes only. All trademarks are the property of their respective owners.

Technical Data & Specifications
Makes & Models
Product FAQ

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Nationwide Delivery

Delivery same day or within 1-4 working days

Payment Methods

Credit Card, Debit Card, EFT, Buy-Now-Pay-Later

We Ship Internationally

UK, USA & RSA Border Countries

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Standard (Retail & Trade)

  • 6 months or 10,000km, whichever occurs first

Taxi, Ambulance, Breakdown, Emergency & Other Response Vehicles

  • Minibus/metered taxis, e-hailing, buses, shuttles, tour/staff transport, scholar transport; ambulances, fire/rescue, security/armed response, breakdown/towing; driving-school & rental/hire vehicles
  • 30 days or 10,000km from the warranty start date, whichever first

Turbochargers, CHRA/Cartridge Cores, Actuators & Turbo Components

  • The full Havoc Turbos warranty applies
  • New: 6 months or 10,000km, whichever occurs first
  • Subject to installation by a qualified turbo technician, to manufacturer spec
  • Applicable to standard/factory stock OEM vehicles only — excludes modified, remapped, performance, racing or upgraded turbochargers

Racing, Motorsport, Dyno & Competition Use

  • No warranty, including any remapped, chipped, tuned or altered-boost/fuelling/actuator vehicle, unless agreed with us in writing at time of sale

Used/Salvaged Parts

  • Sold as is, 30-day start-up warranty
  • Condition: professionally reconditioned before fitment (documented)
  • Testing/refurbishing before fitting is recommended

Warranty

Covers manufacturing defects subject to the part being calibrated/assembled/installed by a qualified mechanic/technician (with verifiable certification) and/or RMI member/approved workshop (with valid membership), proficient and experienced in installing the relevant part. Turbo parts are subject to being assembled by a qualified turbo technician. Root cause of the problem must be identified and solved before installing the new part, i.e. repair the problem before repairing the symptom. Service & all essential ancillary replaced parts records must be available. Further terms and conditions, click here to see our warranty page.

Order Processing

  • Orders are only processed once full payment has cleared.
  • Orders received & paid for by 10am, Mon-Fri, are processed on the same day subject to availability. Where possible, orders after 10am will be processed on the same day.
  • Orders received & paid for during the weekend are processed the next working day as most couriers do not process on weekends, subject availability.
  • Dispatch for local orders, bar any disruption to normal service, will take place on the same day. Note that bulk or large items may require an extra day for processing.
  • Dispatch for international orders, bar any disruption to normal service, will take place on the next day. Note that some regions may require an extra day for processing due to courier requirements.
  • Dispatch is confirmed by way of dispatch notification and waybill/tracking number.
  • Dispatch is primarily from Durban

Delivery South Africa

  • Delivery can take 1 to 4 working days (Mon-Fri) from dispatch, depending on how far you are from our dispatch location. Outlying areas may take longer for delivery.
  • Tracking numbers are provided as and when they are available
  • Should the delivery be done by one of our drivers, you will receive a call/sms/whatsapp/email before delivery takes place.

Delivery International

  • Delivery is via FedEx
  • Delivery time is dependent on the service you select but take notice that the displayed time frames are estimates and any delay from customs at export and customs at import may affect delivery times.
  • Note: You are responsible for all customs taxes, duties, administration, agent and any other clearance fees for your chosen country of delivery. Under no circumstances will we cover any costs. Should an item be returned for your failure to clear, any costs encumbered to receive the goods will be borne by you.

Receiving Goods

  • Please ensure someone is available to receive the goods
  • Any costs that arise from re-delivery attempts are for the customer
  • Inspect goods immediately upon receipt, f the packaging is damaged you must note that on the waybill or device before you sign
  • Inform us of any issues within 24 hours of receipt
  • Should you receive the wrong item, you are obligated to take reasonable care of the products while they are in your possession and on your premises, bearing in mind that if the item was not on your premises, you are still responsible, until the item has been returned.

Terms and conditions apply.

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