HPT GM E99 (ZR1) PCM Upgrade (*Must Mail in PCM*)

The GM E99 ECM, often found in ZR1 applications, is a powerful control module, and this service from HP Tuners allows you to upgrade its capabilities. This isn't a direct replacement part you install yourself; instead, you'll need to mail your existing E99 PCM to HP Tuners for them to perform the necessary modifications. This process ensures that the upgraded module is tailored to your specific needs, offering a more integrated approach than a simple plug-and-play device.

HP Tuners is well-known in the tuning community for their advanced diagnostic and tuning tools, and this service reflects that expertise. By sending in your PCM, you're entrusting your vehicle's engine management to a company that understands the intricacies of GM's electronic control systems. The upgrade is designed to unlock new potential for performance tuning, allowing for more precise control over fuel, spark, and other critical engine parameters. This is essential for anyone looking to significantly modify their vehicle's powertrain for increased power or specific driving characteristics.

It's important to note that this service is not CARB approved and therefore cannot be shipped to California. Additionally, due to state regulations, this product is subject to California's Proposition 65 warning. Before sending in your PCM, ensure you have reviewed all manufacturer documentation and understand the process involved. This upgrade is a significant step for serious performance builds, requiring careful planning and execution.