ATI Damper - 7.074 - 10 Percent Under Drive - AL - 6 Groove - 20+ Toyota Supra / 19+ BMW - Z4 - B58

This is the ATI 918352 crankshaft damper, specifically made for the B58 engine found in the 2020 and newer Toyota Supra and the 2019 and newer BMW Z4. A crankshaft damper, sometimes called a harmonic balancer, is crucial for absorbing torsional vibrations from the crankshaft. Without it, these vibrations can cause premature wear and even damage to the engine over time. This particular ATI damper is designed with a 10 percent underdrive, meaning your accessories like the alternator and power steering pump will spin 10% slower than stock. This can help reduce load on the engine and potentially improve accessory longevity. It also features 6 grooves, allowing for multiple accessory belt configurations if you're running a custom setup.

Crafted from aluminum, this damper is lighter than a stock unit, which can help reduce rotational mass at the front of the engine. ATI is well-known for making robust engine components, and this damper is built to handle the stresses of performance applications. The 10 percent underdrive is a popular choice for many B58 owners looking to slightly ease the load on their accessories while maintaining reliable operation. It's a solid option if you're looking to upgrade or replace your factory damper with something more robust and with specific performance characteristics.