Harrop Supercharger LS3 Performance Parts & Modifications

If you’ve ever driven an LS3 and thought, “This needs just a little more… everything,” then a Harrop supercharger is exactly what you’re looking for. Harrop’s FDFI series is the newest generation of their supercharger technology, engineered right here in Australia and built around the same Eaton TVS system found in heavy hitters like the ZR1 Corvette and ZL1 Camaro. It delivers instant torque, smooth power delivery, and that addictive shove-in-the-back feeling every LS3 owner secretly wants. Whether you’re chasing a stronger street setup or prepping for track work, the transformation is massive - it turns an already great engine into something genuinely exciting.

Unlike older supercharger designs, Harrop’s FDFI system removes the traditional transfer shaft and moves to a front-drive, front-inlet layout. That change alone makes the system noticeably quieter and more efficient, with fewer moving parts to service. Even though the drive shaft runs through the inlet area, Harrop redesigned the inlet to be larger than previous HTV units, meaning there’s zero compromise on airflow or performance. The result is a supercharger that feels smoother, pulls harder, and stays consistent no matter how you drive it.

At Empire Performance, we love the Harrop FDFI platform because it’s engineered as a complete, well-thought-out solution. The integrated twin-pass intercooler cores, upgraded water pump, and short, efficient cooling layout keep intake temps under control, which is a huge advantage for reliability and repeatable power. Plus, Harrop’s exclusive OTR intake feeds the blower directly from the front of the car, unlocking even more potential from the LS3. For VE and VF owners, it’s one of the cleanest, most OEM-style supercharger kits you can buy, and with the power gains on tap, it’s easy to see why so many LS owners consider Harrop the gold standard.

Choosing the Right Harrop Supercharger Kit for Your LS3

When it comes to choosing the right Harrop kit for your LS3, it really depends on how you use the car and how much power you're aiming for. The FDFI range gives LS owners a choice between different rotor sizes, like the incredibly popular FDFI1900 and the higher-capacity FDFI2300. Both deliver that instant, linear torque that Harrop is known for, but the 2300 offers more headroom for high-power builds or future upgrades. Street cars often start with the 1900 for its responsiveness and drivability, while enthusiasts planning E85, cam upgrades, or forged internals usually lean towards the 2300 for its growing room. Either way, you’re getting a serious step up in performance compared to stock.

Supporting mods are an important part of choosing the right kit. While the LS3 can handle a decent amount of boost on factory internals, things like injectors, fuel pumps, and cooling upgrades become essential as power increases, which is why Harrop includes high-flow injectors and a complete intercooler system in their kits. The integrated OTR intake is another advantage, feeding the blower with cool, direct airflow for maximum efficiency. For most VE–VF Commodores and HSV variants, the Harrop kits bolt up cleanly with minimal fuss, and because they’re engineered in Australia, the fit and finish feel very OEM.

At Empire Performance, we help LS3 owners choose the right setup based on their long-term plans, not just their current mod list. Some customers want a reliable street package they can daily without drama, while others want a foundation for 500–600+ horsepower builds. We’ve supplied and supported enough Harrop systems to know what combinations work, what supporting mods you really need, and how far each kit can take you. Whether you're building a tough cruiser or a genuine performer, we’ll guide you to the supercharger package that suits your goals and budget.

Installation, Tuning, Reliability & Ownership

Installing a Harrop supercharger on an LS3 is a task best handled by an experienced workshop, especially since the kit is designed to integrate cleanly with the factory components. The FDFI systems are incredibly well engineered, which means they bolt on with excellent fitment, tidy routing, and minimal modifications, but tuning is absolutely essential. A proper dyno tune ensures safe fueling, correct ignition timing, and maximises the efficiency of the supercharger, especially when pushing higher boost levels or running upgraded cams and exhausts. The good news is that once tuned correctly, LS3s respond beautifully to positive displacement supercharging.

Harrop’s cooling upgrades play a big part in long-term reliability. The twin-pass intercooler cores inside the manifold, the improved water pump, and the shortened intercooler plumbing keep intake temps under control even when you’re leaning on the throttle. That means more consistent power, less heat soak, and better engine longevity. Routine maintenance is straightforward too: keep an eye on belt condition, intercooler fluid levels, and general servicing intervals, and the system will reward you with years of trouble-free performance.

In Australia, Harrop superchargers are widely accepted for street use, but final legality always depends on state regulations and engineering certification. Most VE and VF owners have no issues staying compliant when the supercharger is installed and tuned correctly. From a cost perspective, a Harrop kit is an investment, but considering what you get (supercharger, intercooler system, brackets, OTR intake, injectors, and unmatched engineering), it’s excellent value compared to piecing together a kit or going with cheaper alternatives. And because Empire Performance supplies genuine Harrop products, you get the right kit, the right support, and advice tailored to the LS platform. Once fitted, one drive is all it takes to understand why Harrop is regarded as the benchmark for LS supercharging.