Harrop has been instrumental in developing intelligent suspension and drive-train solutions for endurance and motor racing worldwide.

Harrop Driveline and Suspension components are designed for the enthusiast and racer alike; like those who are looking for extra seconds when circuit racing, and those who are after faultless endurance under everyday road conditions.

The ultimate in replacement BA-FG IRS LSD differentials is now available. No more need to put up with the unpredictable OE "LSD".

Proven design and effective performance all make the Detroit TrueTrac limited slip differential the ideal choice for a wide variety of vehicle applications.

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The ultimate in replacement Commodore/GTO LSD differentials is now available. No more need to put up with the unpredictable factory OE "LSD".

Proven design and effective performance all make the Detroit TrueTrac limited slip differential the ideal choice for a wide variety of vehicle applications.

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The Detroit TrueTrac performs like an open differential under normal driving conditions and automatically transfers torque to the wheel with better traction when ground conditions warrant.

The limited slip responds instantly to torque feedback, anytime, at any speed.

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This complete rear upgrade for the Commodore/GTO IRS range was developed to compliment the upgraded front knuckle and wheel bearing upgrade.

For those who are serious about those extra seconds when circuit racing, or those who are after faultless endurance when carrying heavy loads.

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The Harrop Axle and CV Joint Upgrade is the strongest available system yet fits within the factory fitted semi trailing arm assembly.

Designed to endure even the most brutal abuse and still retain that factory stock appearance. Available to suit both factory standard diff centre, or our Harrop 9" IRS upgrade.

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Replacement IRS differential assembly that utilises the components from the popular Chevrolet 12 Bolt assemblies.

Available with ratio options of 3.08:1 through to 5.46:1. All assemblies are fitted standard with the Eaton TrueTrac differential.

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The cover is cast in our own casting facility and machined on the latest Mazak high speed CNC matching centres. Utilises standard speed sensors and rear mount.

Designed to suit Holden IRS Commodore, Monaro and GTO vehicles. Direct bolt on replacement for the standard rear cover.

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Replacement front wheel bearing and knuckle assembly for fitment on vehicles that are susceptible to ongoing wheel bearing run-out or failure.

Direct replacement for VR to current Commodore  as well as Monaro, GTO and Utilities. Compatible with standard brakes as well as all Harrop brake upgrades.

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Designed for precise, yet effortless gear selection to reduce the incidence of missed gear selection and positive gear shift feel without reducing the height of the standard gear lever.

Designed to suit all Holden Tremec 6 speed gearboxes from the VT Commodore to the current model line-up.

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The cover is manufactured from high grade, heat treated aluminium, CNC machined in Mazak high speed 5 axis machining centres.

Designed to suit Holden IRS Commodore, Monaro, GTO vehicles. Direct bolt-on upgrade for the standard diff cover and sub-frame rear mount.

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The ultimate differential upgrade for those high horsepower IRS Commodores. The Harrop 9" IRS diff conversion utilises all standard 9" differential internals and can be custom assembled depending on ratio and carrier requirements.

Direct bolt-up replacement for VR through pre-VE Commodore IRS.

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