Description
MAHLE | Cummins 3.9L 4BT Lower Gasket Set
Fits: 3.9L 4BT Cummins
This Mahle Lower Engine Gasket Set is a great way to seal the bottom end when rebuilding your 3.9L Cummins Engine.
This is a direct-fit replacement gasket set that built with high-quality materials to meet or exceed the factory specifications.
MAHLE Original® gaskets provide world class sealing products trusted by OEMs & Technicians around the globe.
MAHLE Head Gaskets give you original equipment form, fit, and function, so they fit just like the original!
MAHLE utilises OE equivalent or better materials in all their gasket Sets providing you with the Best Solution for your sealing needs.
We use Mahle head gaskets in all of our Cummins performance builds.
Double Duty Diesel is a dealer of MAHLE and is your online source for diesel stock replacement parts. Call us if you need any stock or performance parts for your Cummins Diesel.
Shipped Australia-Wide
- Dispatched from within Australia with tracking.
- Same-day dispatch on in-stock orders placed before 11am AEST, Monday–Friday.
- Shipping is calculated at checkout based on size, weight and your delivery address.
- Estimated delivery 2–7 business days depending on your location.
Freight question? Call us on (07) 5619 7869.
MAHLE | Cummins 3.9L 4BT Lower Gasket Set Fits: 3.9L 4BT Cummins This Mahle Lower Engine Gasket Set is a great way to seal the bottom end when rebuilding your 3.9L Cummins Engine.
Double Duty Diesel — Manufacturer Pass-Through Warranty
Double Duty Diesel parts carry the original manufacturer's warranty:
- Fluidampr — Lifetime warranty on harmonic balancers
- MAHLE / Clevite — 12 months on bearings, gaskets, sealing components
- Dynomite Diesel — 12 months on stock-spec injectors and pumps; performance/race spec varies
- Power Driven Diesel — 12 months on turbos and bundled tuning kits
- Returns must be notified within 30 days of delivery
- Parts only — installation not covered
Workshop fitment available at Willys for transmissions, injectors and engine internals.
Read the full Double Duty Diesel warranty terms →
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.
