Designed and engineered in Australia the Harrop Differential & Transmission Breather Kit has been designed to replace the factory breathers on your vehicle, and keep it breathing clean in the harshest environments.
It is a 4 port, fully sealed system that breathes back into the induction system, a design that helps to prevent water, mud and other contaminants from getting into your differentials, gearbox and transfer cases as well as eliminating the use of a filter system; this is an essential upgrade for all 4x4 enthusiasts.
Key Features:
Billet aluminum manifold breather block
Left or right mounting capability
4 line input
Fully sealed system
No filters
Designed for most 4x4 models as universal fitment.
View the newHarrop TV videoand download the technical specifications sheet below for further information.
All orders placed with 4x4 Offroad Centre will receive an email confirmation with your tracking number once the order has been dispatched.
If a mobile number is provided at checkout, you will also receive an SMS notification with tracking details when your order is fulfilled. (Landline numbers will not receive text updates.)
Once tracking is issued, it is the customer’s responsibility to monitor delivery progress. Any courier-related issues should be followed up directly with the freight provider. While we’re happy to assist where possible, please note that once an order leaves our warehouse, it is outside of our control.
If your order has not arrived by the estimated delivery timeframe, please email info@4x4oc.com, and we will follow up with the courier on your behalf.
We partner with multiple shipping providers to ensure the fastest and most suitable delivery method for your order. Common carriers include:
Australia Post Regular & Express StarTrack DHL International Toll Ipec TNT Other trusted couriers as required
Some larger or bulky items may ship directly from the supplier to:
The courier used will be displayed on your checkout page and in your tracking notifications (email and SMS).
Important Notes:
Delivery timeframes are estimates from the date of dispatch and are based on business days only.
Delays outside our control may occasionally occur.
For any shipping enquiries, please don’t hesitate to contact our team. Our goal is to ensure a smooth, professional, and hassle-free delivery experience every time.
Pre-Order Information
Items where the “Add to Cart” button is replaced with “Pre-Order” are classified as pre-order items. When placing a pre-order, a warning box will appear outlining the terms and conditions, including the estimated delivery timeframe.
Please keep the following in mind:
Stock is not on hand – we have no control over delivery times until the stock arrives.
Patience is required – pre-ordering secures your item, but fulfilment depends on supplier availability.
High-demand items – pre-orders are the best way to lock in popular products, which often sell out before they even land.
Allow a buffer – please add 2–3 weeks to the provided ETA to account for any unforeseen delays beyond our control.
Pre-ordering ensures you don’t miss out on in-demand products, and we’ll keep you updated as soon as your order is ready to ship.
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