Description
Interstate-McBee Piston Kit W/Pin for 3.9 / 5.9L Cummins
Single Piston – Quantity of six (6) are required for entire set when rebuilding engine
Choice of standard bore, .020 over bore, or .040 over bore.
Includes piston, piston pin and circlips and piston ring set
Larger 155° Bowl to help injection event occur in bowl when advancing timing for improved diesel performance.
Run with 145° injectors
These pistons are good for 600HP
These pistons are NOT a low compression 155° marine piston that will cause smokey driving characteristics
If you would like the standard 145° pistons please contact us
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.
Interstate-McBee Piston Kit W/Pin for 3.9 / 5.9L Cummins Single Piston – Quantity of six (6) are required for entire set when rebuilding engine Choice of standard bore, .020 over bore, or .040 over bore.
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.
