Mahle MS Piston Set Audi S4 81.50mm Bore 86.4mm Stroke 154mm Rod 21mm Pin -7cc 9.0 CR Set of 6

The Mahle MS Piston Set for the Audi S4 is a high-performance engine component designed to enhance power and durability. Featuring a bore diameter of 81.50mm, a stroke of 86.4mm, and a 154mm connecting rod, these pistons are engineered for precise fit and optimal combustion efficiency. The set includes six pistons with a compression ratio of 9.0:1 and a deck clearance of -7cc, making them suitable for rebuilds and performance upgrades. Constructed from high-quality materials, these pistons ensure reliable operation under demanding conditions, providing improved engine response and longevity.

Designed specifically for the Audi S4, these pistons are compatible with models equipped with engines that match the specified dimensions. They are intended for use in performance applications, including street and track driving, where durability and consistent power output are essential. The pistons are a direct replacement for OEM components, offering a straightforward installation process. This set is ideal for enthusiasts seeking to restore or upgrade their engine’s performance, ensuring precise fitment and reliable operation in compatible Audi S4 models.