Mishimoto 20+ Toyota GR Supra 3.0L / 19+ BMW Z4 3.0L Performance Heat Exchanger

When it comes to maximizing performance in your BMW 330i or M340i, keeping intake air temperatures (IATs) low is the key to unlocking consistent power and throttle response. While the air-to-water intercooling system on these B58-powered sports cars is a step forward, the stock heat exchanger still has its limitations—especially under spirited driving, track conditions, or hot climates. The Mishimoto Performance Heat Exchanger is engineered to eliminate these shortcomings with superior cooling capacity, all-aluminum durability, and an optimized dual-pass flow design, ensuring your BMW 330i or M340i stays cooler, faster, and more efficient no matter how hard you push it. Mishimoto's design replaces the factory plastic components with TIG-welded aluminum construction, incorporating reinforced strutted tubes to withstand flex during aggressive cornering. The 31% larger core volume and 48% expanded external fin surface area allow for maximum heat dissipation, reducing intake air temperatures by 5-7°F while keeping intercooler coolant temperatures steady under load. Available in a sleek natural finish and backed by the Mishimoto Lifetime Warranty, this direct-fit upgrade is the ultimate cooling solution for drivers who demand consistent power and long-term reliability from their BMW 330i or M340i.