AMS Performance Limited Edition Heat Exchanger for BMW G8X M2 / M3 & M4 [AMS.48.02.0001-2]

AMS Performance Limited Edition Heat Exchanger for BMW G8X M2 / M3 & M4 [AMS.48.02.0001-2]

Whether being pushed on the track, making 200mph roll racing pulls, or operating in hot climates, the AMS Performance BMW G8X Heat Exchanger for the M2, M3, and M4 is engineered to maintain lower intake temperatures and sustain higher power output. Designed as a high-performance, drop-in solution, this heat exchanger stands as the largest and most effective option available, offering superior cooling capacity without requiring any modifications. The 3.0L S58 twin-turbocharged engine in the G8X BMW utilizes an air-to-water intercooler system, relying on coolant to regulate intake air temperatures. While the factory system performs adequately under mild conditions and stock power levels, it quickly becomes a limiting factor during aggressive driving, leading to heat soak and reduced performance. The AMS Heat Exchanger addresses this issue with a 35% larger core and a significantly more efficient design, tailored for enthusiasts seeking maximum performance from their vehicle.

Engineered for Enthusiasts

• The Snailworks® Engineering Team at AMS Performance applied their meticulous design philosophy by carefully engineering the coolant inlet and outlet fittings with a unique radiused edge. This seemingly minor detail plays a critical role in reducing pressure drop and promoting smoother, more efficient coolant flow throughout the intercooler system. By optimizing the geometry of these fittings, the team ensured that coolant enters and exits the heat exchanger with minimal resistance, enhancing overall system performance. This level of precision and attention to detail distinguishes AMS products from the competition, demonstrating that every component, no matter how small, is engineered for maximum efficiency and performance.

Size Matters

• Maximizing cooling performance within the tight front end of the G8X M3 and M4 is a significant challenge, which is why the AMS Performance Heat Exchanger features a 35% larger core volume, the largest drop-in unit available without requiring any cutting or modification. Built around a high-efficiency, dual-pass, motorsport-grade design, this heat exchanger rapidly dissipates heat to meet the demands of high-performance driving. With double the coolant capacity of the OEM unit and significantly improved flow characteristics, the AMS Heat Exchanger greatly enhances thermal stability across the intercooler system. The result is lower intake air temperatures (IATs), reduced heat soak, and more consistent power delivery during aggressive driving, hot weather, or track sessions. Whether stock or modified, the G8X S58 engine gains a critical cooling advantage with this upgrade.

Track Tested, Race Proven

• The AMS Performance BMW G8X Heat Exchanger was not solely engineered in CAD or limited to bench testing—it was rigorously validated through in-house and on-track testing. The engineering and calibration teams conducted controlled dyno sessions and street evaluations to monitor intercooler air outlet temperatures under demanding conditions. To further validate performance, AMS collaborated with professional time attack racer Jackie Ding, who tested the system on his BMW M2 race car during Gridlife and Super Lap Battle competition events. Across dyno pulls, street use, and real-world motorsport conditions, the AMS unit consistently delivered lower intercooler air outlet temperatures—achieving a peak of just 112.8°F compared to 116.4°F for the OEM system. Notably, the leading aftermarket competitor recorded even higher temperatures at 120.2°F. In a separate coolant-based evaluation, the AMS Heat Exchanger demonstrated a 16°F reduction in coolant outlet temperatures versus the leading competitor, further proving the superior thermal efficiency of the AMS design from every angle.

Features

• Largest drop-in heat exchanger available
• Dual pass design 35% larger core
• Billet 6061 T6 aluminum end tanks
• 16°F lower coolant temps
• CAD-designed and CNC-machined
• Increased coolant flow and efficiency
• AMS-spec core fin height and density for optimized heat transfer
• Double the fluid capacity over OEM
• Direct bolt-on installation, no cutting or drilling required
• Ideal for stock or modified vehicles

Applications

• BMW M2: G87 (2023-present) [3.0L I6 tt S58]
• BMW M3: G80, G81 (2021-present) [3.0L I6 tt S58]
• BMW M4: G82, G83 (2021-present) [3.0L I6 tt S58]

Notes

• Installation instructions can be found here

About AMS Performance

AMS Performance stands out in the realm of turbocharged vehicle enhancement, not just as a frontrunner in the manufacturing of automotive performance parts but also by providing comprehensive services including in-house engine computer calibration, installations of parts and packages, along with engine and transmission building. Distinctively an engineering-driven entity, AMS differentiates itself from other outfits by designing parts that set the performance standard in the industry, utilizing advanced computer-aided designs and the expertise of mechanical engineers with extensive motorsports background. Since its inception 20 years ago, AMS Performance has maintained its leading position, offering everything from turn-key solutions to bespoke components tailored to surpass a variety of performance objectives. Catering to a wide range of motorsport activities from drag racing to road racing, AMS is dedicated to elevating the driving experience for enthusiasts across the spectrum.