KraftWerks 12 Civic Si Supercharger Kit (Only Comes w/120mm Pulley - Must Order 110mm Separately)

If you're looking to significantly boost the performance of your 2012 or 2013 Honda Civic Si, this supercharger kit from KraftWerks is a serious consideration. It centers around the highly efficient Rotrex C30-94 supercharger, known for its patented traction drive technology. This system is designed to give you impressive results across the entire RPM range, offering a linear power curve that feels like torque on demand. Unlike some turbocharger setups, you won't experience the sudden spikes or surging; instead, you get instant throttle response and a smooth, progressive power increase all the way to redline. This more usable power delivery also means reduced cylinder pressures and less strain on your engine's components, contributing to increased reliability.

The Rotrex supercharger itself is compact, operates quietly with low vibration, and is remarkably efficient. Its unique traction drive transmits power through friction between rolling elements, and it features its own self-contained oiling system. This independent system includes a dual-action oil pump to supply traction fluid and a dedicated cooler to maintain proper fluid temperatures, keeping the supercharger running optimally. The kit includes all the necessary brackets, hardware, and a CNC machined idler pulley and tensioner for a simple bolt-on installation. Keep in mind that this kit comes with a 120mm pulley, and if you're aiming for maximum performance, you'll need to order the 110mm pulley separately.

This supercharger system is designed to provide cooler operating temperatures compared to many turbochargers and other supercharger types. This helps reduce intake air temperatures and lowers the risk of detonation, further enhancing engine reliability. While this kit offers a substantial performance upgrade, please note that it is not CARB approved and cannot be shipped to California.