CP Piston & Ring Set for Acura B18C1 - Bore (81.5mm) - Size (+0.5mm) - Compression Ratio (9.0)

Starting with a bore size of 81.5mm and an oversize of +0.5mm, this CP Pistons set is built for the B18C1 engine found in the 1994-2001 Acura Integra. These aren't your typical replacement pistons; they're forged from high-strength aluminum alloy, a process that makes them significantly more durable and resistant to the extreme pressures and temperatures found in performance or rebuilt engines. This robust construction is key to handling increased cylinder pressures, whether you're building a naturally aspirated screamer or a boosted setup.

The design of these pistons contributes to a 9.0:1 compression ratio, which is a solid choice for many engine builds. This ratio offers a good balance, providing enough compression for strong power output without being so high that it requires exotic fuel or becomes difficult to tune, especially if you plan on adding forced induction down the line. CP Pistons are well-known for their precision machining, ensuring each piston is a near-perfect match to the others in the set. This consistency is vital for smooth engine operation and even power delivery across all cylinders.

When rebuilding or significantly upgrading your B18C1 engine, using a set of forged pistons like these is a critical step for reliability and performance. They are designed to withstand the stresses that factory cast pistons might not handle, giving you peace of mind and the foundation for a powerful, long-lasting engine. Remember that these pistons are an oversize part, meaning your engine block will need to be bored and honed to 81.5mm to ensure a proper fit and seal. This is a standard procedure for engine overhauls and performance builds.