Description
Fitment: Internal balance. Crank trigger adapter available – Part No. 400309
| PART # |
720311 |
| Fitment |
Chrysler B/RB 350, 361, 383, 400, 413, 440, 426 HEMI. Internal balance.
Crank trigger adapter available – Part No. 400309 |
| Bore Diameter |
1.5300″ |
| Degree Marking Range |
50 BTDC to 10 ATDC. Additional timing/degree marks at 90, 180 and 270 |
| Degree Markings |
Engraved |
| Engine Balance |
Internal |
| Finish |
Black Zinc |
| Keyway |
Single |
| Length |
2.180″ |
| Material |
Steel |
| Mounting Hardware Included |
No |
| Outside Diameter |
7-1/4″ |
| Pulley Bolt Pattern |
6 bolt holes evenly spaced pattern |
| Safety Rating |
SFI 18.1 |
| Weight / Rotating Weight |
11.8 lbs / 7.9 lbs |
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.
PART # 720311 Fitment Chrysler B/RB 350, 361, 383, 400, 413, 440, 426 HEMI. Internal balance. Crank trigger adapter available – Part No. 400309 Bore Diameter 1.5300″ Degree Marking Range 50 BTDC to 10 ATDC.
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.
