CSF8351 High-Performance Charge-Air Coolers for BMW G90 / G99 M5 (S68)

Vehicle Fitment

• 2025-present BMW M5 (G90) - S68 4.4L twin-turbo
• 2025-present BMW M5 Touring (G99) - S68 4.4L twin-turbo

Features

• Custom liquid-to-air intercooler core, CFD-optimized for high flow
• ~100% larger core volume per cooler compared to OEM units
• One-piece cast inlet end tank with integrated charge pipe for strength
• Integrated 1/8" NPT ports on outlet tank for methanol or nitrous injection
• OEM-style quick-connect water inlets and sensor ports for straightforward install
• Drop-in design with only minor modifications required for best fitment
• Crinkle-black powder-coat finish standard (other finishes available)
• High durability TIG-welded cast end tanks replacing weaker factory plastic tanks

Specifications

• Part Number: 8351
• Core Type: Liquid-to-Air Intercooler
• Material: Aluminum core + cast end tanks
• Boost Ports: Dual 1/8" NPT on outlet for injection systems
• Water Ports: OEM quick-connect style
• Finish: Crinkle Black (custom finishes available)

Included Components

• 2x CSF 8351 charge-air coolers (left & right)
• Mounting hardware and brackets
• Installation guide and spec sheet

Product Description

The **CSF 8351** is a high-performance pair of charge-air coolers designed specifically for the BMW M5 G90 / M5 Touring G99 with the S68 twin-turbo V8. These coolers offer almost double the core volume of the stock units, helping to drastically lower Intake Air Temperatures (IATs) under high-power operation.

Built with a one-piece cast inlet end tank (integrating the charge pipe) and larger, TIG-welded end tanks, these coolers are rugged enough to withstand substantially increased boost pressure. The built-in dual 1/8" NPT ports allow for straightforward integration of methanol or nitrous systems, while OEM-style water ports make installation easier.

While designed as a "drop-in," CSF notes that some minor adjustments are needed for perfect alignment (such as trimming the air balancing tube and shaving down mounting pins). When properly installed, these coolers provide a serious thermal upgrade capable of supporting high-boost builds and tuned S68 engines with much better heat rejection than stock.