LSJ Stage 2 Kit

The ZZP LSJ Stage 2 Kit is a comprehensive performance upgrade designed to simplify the process of increasing power on supercharged 2005-2007 Cobalt SS and 2004+ Ion Redline vehicles. This kit has been dyno-proven to deliver reliable power gains by supporting changes to the supercharger pulley size. The included PCM programming adjusts fuel and timing parameters to optimize performance with the new pulley configuration. Key components of the kit include a ZZP modular pulley hub, your selected aluminum pulley size (options range from 3.1" down to 2.9"), four NGK BKR7E spark plugs with a .035" gap, and four Siemens 60# injectors with an EV6 adapter harness. You can also choose between a ZZP Stage 2 belt, an oversized tensioner pulley (which requires modification of the factory tensioner), or a fully adjustable tensioner for optimal belt tension. Ordering considerations include selecting your pulley size and color. Larger pulleys are recommended for lower octane fuel, while smaller pulleys require higher octane and additional supporting modifications like a downpipe. The tensioner/belt option is crucial; the adjustable tensioner is highly recommended, especially for smaller pulley sizes (2.8" and below), to prevent belt slippage and failure. The Stage 2 belt is best suited for 3.1" and 3.0" pulleys. For vehicles subject to E-Check emissions testing, specific core charge options are available to ensure compliance, as the VIN cannot be altered on the flashed PCM. Customers can opt for a refundable core charge by sending in their original PCM, flashing their existing PCM by mail, or using HP Tuners software to upload a provided file themselves. If you are doing your own tuning, the kit can be purchased without a PCM or tune. A pulley puller may be required for installation and can be rented or purchased separately.