ATI Shell Assy - 6.78 - Alum - 6 Grv - Nissan 350Z VQ35 Street - 2 Ring

This is the ATI Shell Assy, part number 917053, a crankshaft damper specifically made for the Nissan 350Z with the VQ35 engine. It's designed for street applications and features a 6-groove, 2-ring setup with a 6.78-inch diameter. A crankshaft damper is crucial for any engine because it helps absorb torsional vibrations that occur when the crankshaft rotates. Without it, these vibrations can lead to premature wear and potential damage to the crankshaft and other engine components over time.

This particular damper from ATI is constructed from aluminum, making it a well-built component that balances strength with weight. The 6-groove design allows for multiple accessory belt configurations, which can be helpful if you've modified your engine's accessory drive system. The 2-ring configuration is a specific design choice by ATI for this application, aimed at optimizing its performance for street use by controlling the torsional harmonics generated by the VQ35 engine. ATI is known for making solid components for performance applications, and this damper is no exception.