Description
PDI | Big Boss Intake Manifold Cummins X15 | ISX15 2013.5-2024
Available for: 2013.5 – 2024 Cummins ISX15 & X15 Engines
Warranty: 1 Year Unlimited Mile Warranty
PDI Big Boss Intake manifolds are built to increase and balance the air going into the engine.
By opening up the manifold in key areas airflow will increase up to 35% leading to lower air intake temperatures resulting in power gains of up to 20hp.
These direct replacement manifolds are simple to install and utilise factory hardware.
Like all PDI products, the Big Boss intake manifolds will increase horsepower and efficiency to make your drive more enjoyable and save you money.
| OEM Reference Part Number | 5440760, 3688355 |
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.
PDI | Big Boss Intake Manifold Cummins X15 | ISX15 2013.5-2024 Available for: 2013.5 – 2024 Cummins ISX15 & X15 Engines Warranty: 1 Year Unlimited Mile Warranty PDI Big Boss Intake manifolds are built to increase and balance the air going into the 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.
