GSC P-D Mitsubishi Evolution 4-8 4G63 S1 Cams 268/268 Billet

This is a set of GSC Power Division S1 camshafts specifically for the 2005 Mitsubishi Lancer equipped with the 4G63 engine. These camshafts are designed to replace your stock units and offer an improved powerband, particularly in the mid to upper RPM range, making them a popular choice for enthusiasts looking to get more out of their Evolution 4-8 models. The S1 grind features a 268-degree intake and 268-degree exhaust duration, which is a noticeable step up from factory specifications without requiring extensive valvetrain modifications.

Crafted from billet material, these camshafts are built for durability and consistent performance under demanding conditions. The billet construction ensures a strong core that can handle increased spring pressures and higher lift profiles often associated with performance builds. GSC Power Division is known for its focus on camshaft technology, and the S1 profile is a well-regarded option for those seeking a balanced increase in horsepower and torque. Installation involves removing the original camshafts and installing these new ones, typically requiring a degree wheel to ensure proper timing for optimal results. It's important to note that these camshafts are not CARB approved and cannot be shipped to California.

When upgrading your camshafts, it's often recommended to also consider upgraded valve springs and retainers to match the increased lift and duration, ensuring the valvetrain can reliably handle the new profile. This set is designed to be a direct replacement for the stock camshafts, fitting right into the factory location on your 4G63 engine.