Engine & Performance

Building a Stronger Engine: A Guide to Performance Internals

The quest for more horsepower inevitably leads to the heart of the car: the engine internals. Factory components are designed for stock power levels and can become a critical failure point under increased stress. Upgrading to high-performance internals is the only way to build a powerful and reliable engine. This guide explains the core component groups, which you can explore using our navigation above.

The Anatomy of a Built Engine

• Pistons: The foundation of power. Upgrading from brittle cast factory pistons to strong, lightweight forged pistons is the first step in preparing an engine for serious boost or RPM.
• Connecting Rods: The link between the pistons and the crankshaft. Forged steel H-beam or I-beam rods are exponentially stronger than stock and are essential for preventing catastrophic failure.
• Camshafts & Valvetrain: The "lungs" of your engine. Performance camshafts have more aggressive profiles (lift and duration) to let more air in and out, while upgraded valve springs prevent valve float at high RPM.
• Engine Hardware & Studs: The bolts that hold it all together. Factory head and main bolts can stretch under high cylinder pressures. Upgrading to high-strength studs from ARP is mandatory to prevent head gasket failure.

When Do You Need to Build Your Engine?