Will it fit your vehicle?
This part is listed to suit:
- MakeChev / GMC
- ModelSilverado
Fitment listings are a guide. For a guaranteed match, send us your rego or VIN and our team will confirm the exact part before you pay.
ARP | Duramax LBZ/LMM/LML Main Stud Kit 230-5402
$742.00
Available to order — special-order item, usually ships in about 2 weeks. Order now to reserve yours.
These main studs clamp the main bearing caps to the block on the Duramax.
Available on back-order
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Willys Workshop · Oxley & Warana, QLD
Easy returns within 14 days
12 Month Warranty
Tuning & Fitment Available
Fast AU-Wide Shipping
Easy returns within 14 days
12 month warranty
Description
These main studs clamp the main bearing caps to the block on the Duramax. Sourced through Willys Workshop’s Double Duty Diesel dealer network – genuine and performance diesel hard parts for Cummins and built-engine applications. Part reference ARP230-5402.
Listed to suit the Duramax – confirm against your engine and build before ordering; our diesel team can verify the right part. Shipped Australia-wide or fitted in-store at our Oxley (Brisbane) and Warana (Sunshine Coast) workshops.
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.
These main studs clamp the main bearing caps to the block on the Duramax.
Additional information
| Weight | 1.5 kg |
|---|---|
| Dimensions | 25 × 20 × 12 cm |
| Make | Chev / GMC |
| Model | Silverado |
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.
Questions, or need a fitment check?
Send your rego or VIN and our Australian-based team will manually confirm fitment before you buy.
Prefer to text your rego/VIN? 0485 885 957
