Upgraded Cylinder Head Gasket for All 2.0 Turbo FSI Applications High-Performance Metal Head Gaskets for All 2.0 TFSI Engines Multi-Layer Head Gasket for Lowering Compression Ratio Upgraded Cylinder Head Gasket for All 2.0 Turbo FSI Applications These high-strength multi-layer steel (MLS) head gaskets are thicker than OEM versions, effectively reducing the engine’s compression ratio. On performance models like the S3 or Golf R, for example, the compression can be lowered to around 9:1. This reduction is essential when increasing boost pressure and aiming for higher power output, as it helps prevent engine knock and ensures long-term reliability under extreme conditions.