Supertech Toyota 4AGE 82mm Bore 11:1 CR Pistons - Set of 4 (Use w/20mm Rod Width) (Excl Rings)

If you're rebuilding the engine in your Toyota 4AGE and looking to increase compression for more power, a set of forged pistons like these from Supertech is a solid choice. These pistons are designed for an 82mm bore and feature an 11.5:1 compression ratio, which is a notable bump over stock. This higher compression helps extract more energy from the fuel, leading to improved performance. They are built to work with a 20mm rod width and are sold as a set of four, but remember they do not include piston rings, so you'll need to source those separately.

Supertech makes these pistons from forged aluminum, a material chosen for its strength and ability to withstand the higher pressures and temperatures associated with increased compression. The forging process aligns the metal's grain structure, making the piston exceptionally strong and durable, which is crucial for performance applications. The 82mm bore size is a common upgrade for the 4AGE, allowing for a slight increase in displacement. The 11.5:1 compression ratio is a popular target for naturally aspirated builds aiming for a good balance between power and pump gas drivability, though careful tuning will be essential to take full advantage of it and avoid detonation.

When installing these pistons, ensure you have the correct connecting rods that accept the 20mm wrist pin. It's also important to have your engine block professionally bored and honed to the exact 82mm specification for a proper fit. Because these are performance pistons designed for increased compression, proper engine management, including fuel and ignition timing, is critical for reliability and optimal performance. Please note that these pistons are not CARB approved and cannot be shipped to California.