GSC P-D Mitsubishi Evolution 4-8 4G63 S3 Cams 280/280 Billet

When you open the box, you'll find a pair of GSC Power Division S3 camshafts, specifically designed for the 4G63 engine found in the 2005 Mitsubishi Lancer Evolution 4-8. These aren't just any camshafts; they're precision-ground from solid billet material, which is a strong foundation for high-performance engine builds. The S3 profile is a popular choice for those looking to significantly improve their engine's breathing capabilities, especially when paired with other modifications.

These camshafts feature a 280-degree duration on both the intake and exhaust sides. This means the valves stay open for a longer period during each engine cycle, allowing more air and fuel mixture into the cylinders and more exhaust gases out. This extended valve timing is key to unlocking more power, particularly at higher RPMs. The billet construction means these cams are well-built and can handle the stresses of aggressive driving and increased engine loads. They are designed to be a direct replacement for your stock camshafts, making installation more straightforward, though it's always recommended to consult your vehicle's service manual or a professional mechanic for the proper procedure.

Keep in mind that these camshafts are not CARB approved and cannot be shipped to California. They are intended for off-road or competition use where emissions regulations may differ. If you're building a performance Lancer and aiming for a noticeable increase in horsepower and torque, especially in the mid-to-high RPM range, these S3 cams from GSC Power Division are a solid option to consider.