Description
Power Driven Diesel | 12 Valve 5.9L Cummins “60LB” Valve Springs
These springs utilise the stock keepers and locks.
The springs are good to 4500rpm but the stock keepers and locks are not.
Highly recommend adding Hardened locks and retainers if running 4K GSK
If you plan on racing or pulling you should strongly consider the PDD conical springs with upgraded locks and retainers.
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.
Power Driven Diesel | 12 Valve 5.9L Cummins “60LB” Valve Springs These springs utilise the stock keepers and locks. The springs are good to 4500rpm but the stock keepers and locks are not.
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.