AMS Performance Heat Exchanger - BMW G8X M2/M3/M4 S58 (2021+)

The AMS Performance Heat Exchanger for BMW’s G8X S58 engines is the largest drop-in air-to-water cooler on the market, engineered to slash intake temperatures and prevent heat soak under the most demanding conditions. Whether you’re on track, drag racing, or tackling long high-speed runs, this 35% larger dual-pass core delivers consistent power by keeping your 3.0L twin-turbocharged engine cool—no cutting, drilling or modifications required.

Key Features:

• 35% larger core volume over OEM for maximum thermal capacity

• Dual-pass, tube-and-fin core for superior heat rejection

• CNC-machined 6061-T6 billet-aluminium end tanks for perfect fitment

• 16°F lower coolant temperatures compared to leading competitors

• Radiused inlet/outlet fittings minimise pressure drop and boost coolant flow

• Integrated bleeder port accessible through the front bumper

• 200% more fluid capacity versus stock for enhanced stability

• Direct bolt-on installation using factory mounting points

Engineering Excellence:
Developed with advanced 3D CAD and CFD analysis, the AMS heat exchanger features purpose-built end tanks and optimised internal passages. Our SnailWorks® team refined every detail—from billet-machined brackets to motorsport-grade core design—to ensure OEM-style fit, reliability and unmatched cooling performance.

Proven Performance:
Track validation by professional racer Jackie Ding and in-house testing show intake-air temperatures consistently lower than stock and out-performing major aftermarket rivals. On repeated dyno and track runs, the OEM unit peaked at 116.4°F, the competitor at 120.2°F, while AMS held steady at just 112.8°F.

Compatibility:
• BMW M2 G87 S58
• BMW M3 G80 Competition S58
• BMW M4 G82/G83 Competition S58