Supertech Honda B20 Block B16 Head 85mm Bore +5.5cc Dome 12.5:1 CR Pistons - Set of 4 (Excl Rings)

These Supertech pistons are forged from high-strength aluminum, a common choice for performance engine builds because it offers a good balance of strength and light weight. Each piston in this set is precisely machined to an 85mm bore, designed to work with a B20 block and a B16 cylinder head. The dome shape is a +5.5cc design, which, when combined with the specific B16 head, helps achieve a 12.5:1 compression ratio. This higher compression ratio is a key factor in increasing an engine's power output and efficiency, especially when paired with appropriate tuning.

The construction uses a 4032 aluminum alloy, known for its durability and resistance to thermal expansion, which is crucial for high-performance applications where temperatures can get extreme. This material choice helps ensure the pistons can withstand the rigors of demanding engine use. It's important to note that this set includes four pistons but does not come with piston rings; you will need to source those separately to complete the assembly. Proper installation and balancing are critical for these components to perform as intended and to ensure the longevity of your engine build.

When planning your engine build, remember that achieving a 12.5:1 compression ratio typically requires careful consideration of fuel octane and engine management. This setup is generally best suited for naturally aspirated builds aiming for maximum power, or for forced induction applications where the tuner can manage the increased cylinder pressures. Always refer to the manufacturer's detailed installation guide for specific clearances, ring gap recommendations, and assembly procedures to ensure a successful build.