Vortex 338CZK-37 CAT5 520 Aluminum Rear Sprocket 37-Tooth Black

The Vortex 338CZK-37 is a CAT5 aluminum rear sprocket featuring a 520 chain pitch and 37-tooth count with a black anodized finish. Engineered for performance-minded riders, this sprocket is CNC-machined in the U.S.A. from a specially formulated aerospace-grade aluminum alloy and delivers a significant weight reduction over stock steel sprockets without sacrificing durability.

Key Features:

• 520 Chain Pitch — designed for 520 size OEM replacements or suitable 520 conversion applications
• 37-Tooth rear sprocket for precise final drive ratio tuning
• Lightweight CAT5 aluminum construction — machined from aerospace-grade aluminum alloy per Vortex specifications
• Black anodized finish with contrasting silver machine-cut highlights for a premium appearance
• Saber tooth groove design — Vortex patented tooth profile increases sprocket longevity and chain engagement
• 100% CNC manufactured in the U.S.A. for consistent quality and tight tolerances
• Lighter and more visually striking than OEM steel sprockets

The Vortex CAT5 series is a trusted choice for street and track riders looking to optimize gearing, reduce unsprung rotational mass, and add a custom look to their drivetrain. The 338CZK-37 fits specific motorcycle applications — verify fitment before ordering.