Cummins 4BT / 3.9L Cylinder Head – NEW
$2,013.00
Zip and humm are available over the phone: (07) 5619 7869
Cummins DCEC 4BT Cylinder Head – New Comes leaded with new valves, valve springs, locks and retainers. Newly manufactured aftermarket cylinder head.
Fast AU-Wide Shipping
Returns within 30 days
12 month warranty
Will it fit your vehicle?
| Make | Model | Series | Years | Engine |
|---|---|---|---|---|
| — | — | — | — | 4BT |
A dash means the listing does not narrow it down that far (for example no build dates are listed). Check with us if your vehicle was built near a model change.
Fitment listings are a guide. Not sure? Send us your rego or VIN and our team will check the part for your vehicle, before or after you order.
Description
The Cummins 4BT / 3.9L Cylinder Head – NEW is supplied new and genuine through Willys Workshop.
Cummins DCEC 4BT Cylinder Head – New
Comes leaded with new valves, valve springs, locks and retainers.
Newly manufactured aftermarket cylinder head.
Reinforced ribs throughout, strengthened walls, thicker spring seats and deck surface.
Gasket surface is freshly machined.
Exceeds OEM specifications for strength and durability.
About Double Duty Diesel
Double Duty Diesel build heavy-duty engine internals and driveline components for Cummins, Duramax and Powerstroke platforms, engineered for towing, performance and competition duty cycles.
Fitment
Confirm your exact vehicle, engine and build date against the part number (WW-DDD-00500) before ordering, or contact our team and we will check it for you.
Delivery
Live freight is calculated at checkout on your postcode, or contact us for a freight quote to your address before you order.
Fitting available at Willys Workshop, Oxley (Brisbane) and Warana (Sunshine Coast). Not sure it is the right part for your setup? Get in touch for a quote and fitment check.
Shipped Australia-Wide
- Ships direct from our supplier in NSW with tracking.
- Road freight is calculated at checkout for your address.
- Delivery usually takes 2–10 business days after dispatch, depending on your location.
- Need your tracking number? Once your order has shipped, email sales@willysworkshop.com.au with your order number and we’ll send you the carrier and tracking details.
Freight question? Call us on (07) 5619 7869.
Cummins DCEC 4BT Cylinder Head – New Comes leaded with new valves, valve springs, locks and retainers. Newly manufactured aftermarket cylinder head. Reinforced ribs throughout, strengthened walls, thicker spring seats and deck surface. Gasket surface is freshly machined.
Additional information
| Weight | 40 kg |
|---|---|
| Dimensions | 75 × 45 × 35 cm |
Warranty: 12 months from Willys Workshop
Sold and warranted by Willys Workshop. Parts carry our 12-month warranty against defects, from the date of purchase or installation (whichever is later), subject to any manufacturer terms and fair wear and tear (Terms & Conditions, clause 7.1(b)). This is in addition to your rights under the Australian Consumer Law, which cannot be excluded.
- 30-day change-of-mind returns on eligible items: unused, uninstalled and in the original packaging, with a Return Authorisation from us first. A 15% restocking fee applies and return postage is at your cost.
- Special-order or imported-to-order items, electrical parts, ECUs and tuners once registered, connected or flashed, parts that have been fitted or modified, and clearance items can’t be returned for change of mind. Your rights for faulty goods still apply.
- Refunds are made to your original payment method within 14 business days of us receiving and inspecting the return.
Full details: Returns & Refund Policy and Terms & Conditions.
Warranty claims are coordinated through Willys Workshop. Email sales@willysworkshop.com.au or call Warana (07) 5619 7869 / Oxley (07) 3377 3421 with your order number and a description of the issue.




