At DMG Motorsports, we present the Vortex Front C/S Sprocket Steel 17T-520 for BMW (Part #3258-17) - a precision-engineered countershaft sprocket built to convert your BMW's final drive to a stronger, race-proven 520 chain configuration. Designed as a direct fit for the BMW S1000RR and compatible S-series models, this sprocket delivers the durability, concentricity, and reduced rotating mass that street and track riders demand from their drivetrain components. Whether you're chasing lap times or simply want a more reliable final drive, this Vortex sprocket is engineered to keep power delivery smooth and consistent ride after ride.

Features:

• Precision manufactured and induction hardened to precise tolerances for improved concentricity and a stronger, quieter, longer-lasting sprocket
• High carbon steel construction for maximum strength
• Special corrosion-resistant plating to protect against the elements
• Drilled lightening holes reduce rotating mass for quicker acceleration
• 17-tooth design converts drive to 520 chain size
• Fits BMW S1000RR (2009-2020), S1000R (2014-2018), S1000XR (2016-2021), HP4 (2013-2014), and HP4 Competition (2014)
• Direct bolt-on replacement for OE front sprocket

Fitment