Cometic BMW S63/N63 90mm Bore .032in MLX Head Gasket

SKU: C15475-032 / UPC: 191070544294

Cometic BMW S63/N63 90mm Bore .032in MLX Head Gasket

The Cometic BMW S63/N63 90mm Bore .032in MLX Head Gasket is engineered for BMW’s high-output N63B44 and S63B44 engines. Designed with cutting-edge MLX (Multi-Layer Stopper) technology, this head gasket delivers robust sealing and durability for high-performance applications, making it the go-to choice for enthusiasts and professionals seeking reliability under extreme conditions. Crafted by Cometic Gasket, a trusted name in motorsports since 1989, this gasket ensures your engine performs at its peak, whether on the street or the track.

Why Choose the Cometic?

The Cometic MLX Head Gasket stands out with its innovative design, featuring multiple layers of embossed stainless steel and a specialized stopper fold-over layer. This construction enhances clamp load around the combustion chamber, providing a secure seal for open-deck engine blocks without increasing bore distortion. The proprietary Viton coating on the outer layers withstands temperatures up to 482°F (250°C), ensuring resilience in harsh environments. Unlike traditional gaskets, this MLX design requires no sealants or re-torquing, simplifying installation and maintenance. It’s the ideal solution for BMW owners prioritizing performance and longevity.

What’s Included in Your Purchase

• Cometic MLX Head Gasket (Single): SKU C15475-032, 90mm bore, .032in compressed thickness
• Material Composition: Multi-layer stainless steel with Viton rubber coating
• Packaging: Securely packaged to ensure safe delivery
• Warranty: Manufacturer’s warranty as per Cometic Gasket’s terms.

Note: This is a single gasket. For engines requiring left and right gaskets, purchase two units. Not compatible with engines featuring O-rings or receiver grooves around cylinder bores, such as the BMW F90 M5 S63B44B engine.

Fitment Specifications

The Cometic C15475-032 MLX Head Gasket is designed to replace BMW part numbers 11127567764 and 11127567765, fitting a wide range of BMW models with N63B44 and S63B44 engines. Below is the comprehensive fitment list:

• BMW 550i (Base): 2010–2016
• BMW 550i GT (Base): 2010–2015
• BMW 550i GT xDrive (Base): 2010–2017
• BMW 550i xDrive (Base): 2011–2016
• BMW 650i (Base): 2012–2018
• BMW 650i Gran Coupe (Base): 2013–2019
• BMW 650i xDrive (Base): 2012–2018
• BMW 650i xDrive Gran Coupe (Base): 2013–2018
• BMW 750i (Base): 2009–2015
• BMW 750i xDrive (Base): 2010–2015
• BMW 750Li (Base): 2010–2015
• BMW 750Li xDrive (Base): 2010–2015
• BMW 750i ActiveHybrid: 2011–2012
• BMW 750Li ActiveHybrid: 2011–2012
• BMW Alpina B6 xDrive Gran Coupe (Base): 2015–2018
• BMW Alpina B7 (Base): 2011–2015
• BMW Alpina B7 xDrive (Base): 2011–2015
• BMW Alpina B7L (Base): 2011–2015
• BMW Alpina B7L xDrive (Base): 2011–2015
• BMW X4 (M40i): 2016–2018
• BMW X5 (M, xDrive50i): 2010–2013, 2015–2018
• BMW X6 (M, xDrive50i): 2008–2019
• BMW X6 ActiveHybrid: 2010–2011
• BMW M5 (F10): 2012–2016
• BMW M6 (F12/F13/F06): 2012–2018
• BMW X5M: 2010–2013, 2015–2018
• BMW X6M: 2010–2018

Important: This gasket does not fit the BMW F90 M5 with the S63B44B engine code due to specific design requirements.

Technical Specifications

• Part Number: C15475-032
• UPC: 191070544294
• Bore Size: 90mm
• Compressed Thickness: .032 inches (0.81mm)
• Material: Multi-layer stainless steel with Viton coating
• Technology: MLX (Multi-Layer Stopper) with HP shim for enhanced combustion chamber sealing
• Weight: Approximately 1.5 lbs.
• Shipping Dimensions: Approximately 20” x 8” x 0.5”.

Performance Benefits

• Enhanced Sealing: The MLX stopper layer prevents combustion seal yielding, ensuring consistent performance under high boost or extreme conditions.
• Durability: Stainless steel construction resists corrosion and rebounds effectively, extending gasket life.
• Heat Resistance: Viton coating withstands temperatures up to 482°F, ideal for turbocharged N63/S63 engines.
• No Re-Torquing: The chemical bond formed during the first heat cycle eliminates the need for re-torquing, saving time and effort.
• Motorsport Proven: Trusted by champions in GNCC, AMA, and NASCAR, Cometic gaskets are built for high-stakes performance.

Why This Gasket Excels

The Cometic C15475-032 MLX Head Gasket is crafted for BMW N63/S63 engines, delivering reliable sealing for high-horsepower applications up to 1200HP. Its multi-layer design and HP shim technology provide a robust seal, preventing blowout and compensating for head lift. Unlike other gaskets, the MLX technology ensures a micro-seal against fluids, conforming to cylinder head and block surfaces for a precise fit. This gasket is a direct replacement for BMW’s OEM parts, offering performance-focused engineering at a competitive price point.

Installation Notes

• Requires smooth, flat cylinder head and block surfaces not compatible with O-ringed or grooved bores.
• Professional installation recommended for optimal performance.
• Always verify fitment with your specific vehicle and engine code before purchase.