Engine Internals & Components

Power is built from the inside out. The components inside your engine determine how much it makes, how reliably it makes it, and how long it lasts under load. Whether you're assembling a fresh short block, refreshing a tired motor, or building a high-output engine from the ground up, this collection covers every internal and supporting component — camshafts, crankshafts, pistons, connecting rods, cylinder heads, valvetrain, timing, gaskets, oil pans, water pumps, motor mounts, intake manifolds, harmonic balancers, and complete engine kits.

Camshafts and valvetrain components are where engine character is defined. Cam selection — lift, duration, and LSA — determines where the power band lives, how the engine idles, and how it responds to throttle input. Matched lifters, rocker arms, pushrods, and timing sets ensure the valvetrain operates with the precision and durability the cam profile demands. Getting this combination right is the single most impactful decision in any performance engine build.

Cylinder heads control airflow in and out of the combustion chamber — and airflow is horsepower. Aftermarket performance heads offer larger ports, improved combustion chamber geometry, and higher-flow valve configurations that factory castings simply can't match. Available in iron and aluminum for a range of small block and big block applications, with options spanning street performance to all-out race configurations.

Pistons, connecting rods, and crankshafts form the rotating assembly — the mechanical foundation that converts combustion pressure into crankshaft torque. Forged pistons handle detonation and heat cycles that cast units can't survive. H-beam and I-beam connecting rods provide the strength-to-weight ratio required for high-RPM and forced induction applications. Forged and billet crankshafts deliver the torsional rigidity needed when power levels exceed what factory cranks were designed to handle.

Intake manifolds are a critical link between the induction system and the cylinder heads. Single-plane manifolds favor top-end power and high-RPM output. Dual-plane designs broaden the power band for street and strip use. Tunnel ram and specialty manifolds serve purpose-built race applications. Matching the manifold to the cam, heads, and intended RPM range is essential for maximizing the return on every other internal component.

Engine gaskets and head gaskets seal the combustion chamber, coolant passages, and oil circuits under extreme pressure and temperature cycling. Quality gaskets are not a place to cut costs — a failed head gasket on a built engine is an expensive lesson. Harmonic balancers protect the crankshaft from torsional vibration that accelerates bearing and journal wear, particularly on high-compression and stroker applications.

Oil pans, water pumps, and motor mounts complete the package. A performance oil pan with baffling and a proper sump prevents oil starvation under hard acceleration and cornering. High-flow water pumps improve coolant circulation on modified engines running tighter thermostats and higher heat loads. Solid and performance motor mounts reduce drivetrain slop and improve throttle response feel — particularly noticeable on high-torque applications.

This collection serves builders across the full spectrum — mild street rebuilds, hot street/strip combinations, pro-touring and road race engines, and all-out drag builds. Domestic V8 platforms are well represented, with components available for small block and big block Chevy, Ford, and Mopar families.

Engine assembly requires precision measurement, proper tooling, and attention to clearances. Component selection should be matched across the entire rotating and valvetrain assembly for optimal results. When in doubt, consult with an engine builder before finalizing your parts list.

Shop the full Engine Internals & Components collection and build the engine your chassis deserves.

Showing 2997 of 2997 products
Filter Products

Filter Products

Showing 2997 of 2997 products

Clear

Showing 1953 -1968 of 2997 items