Harley-Davidson SWITCHBACK COLLECTION DERBY COVER BLACK 25701521

Put performance first with Switchback Collection accessories. This forged billet aluminum cover features machined textured details protected with a durable black anodized finish. These lightweight designs won’t slow you down.

• Durable black anodized finish

• Machined textured details for added contrast

• Authentic Bar & Shield logo

• Includes mounting hardware

• Complete this custom look with additional accessories from the Switchback™ Collection

Fits ’18-later FLSB and ’19-later Softail models. Also fits ’18 Softail models equipped with Narrow Profile Primary Cover P/Ns 25701077, 25700913, 25700937, 25700941, 25701039, 25701040 and 25701043. Harley-Davidson SWITCHBACK COLLECTION DERBY COVER BLACK 25701521

Harley-Davidson SWITCHBACK COLLECTION DERBY COVER BLACK 25701521

The Harley‑Davidson Switchback™ Collection Derby Cover – Black Anodized (Part # 25701521) is a premium engine trim accessory designed to enhance both the aesthetics and customize‑ability of compatible Softail motorcycles. As part of Harley‑Davidson’s Switchback™ Collection of performance‑styled trim pieces, this derby cover brings a purposeful, refined look to the primary side of the engine while maintaining the high‑quality fit and finish Harley‑Davidson owners expect. (Harley-Davidson) Harley-Davidson SWITCHBACK COLLECTION DERBY COVER BLACK 25701521

Performance‑Inspired Styling & Materials
The Switchback Derby Cover is forged from billet aluminum, a manufacturing process that produces a strong, lightweight piece with tighter tolerances than cast alternatives. Its forged construction not only reinforces durability but also gives it a distinctive, premium feel befitting custom builds. (Harley-Davidson) Harley-Davidson SWITCHBACK COLLECTION DERBY COVER BLACK 25701521

One of the most striking visual elements of this cover is its durable black anodized finish — a protective surface treatment that delivers a deep, rich black tone. Anodizing enhances resistance to corrosion and everyday wear while preserving that sleek, modern appearance you can proudly show off on the road. (Harley-Davidson) Harley-Davidson SWITCHBACK COLLECTION DERBY COVER BLACK 25701521

To add dimension and contrast, Harley‑Davidson incorporates machined textured details into the design. These precisely milled grooves and patterns catch the light differently than the anodized backdrop, creating visual depth that distinguishes this cover from more basic trims. Subtle texturing also echoes performance‑oriented motifs found elsewhere on upgraded motorcycle components. (Harley-Davidson) Harley-Davidson SWITCHBACK COLLECTION DERBY COVER BLACK 25701521

An authentic Bar & Shield® logo is featured prominently — a classic Harley‑Davidson emblem that reinforces the part’s genuine heritage and ties in with other accessories for a cohesive, branded aesthetic. (Harley-Davidson) Harley-Davidson SWITCHBACK COLLECTION DERBY COVER BLACK 25701521

Fitment & Compatibility
This derby cover is designed to fit a broad range of ’18‑later Harley‑Davidson FLSB (Softail Slim) models and ’19‑later Softail® models, as well as ’18 Softail bikes equipped with specific narrow profile primary covers identified by part numbers 25701077, 25700913, 25700937, 25700941, 25701039, 25701040, and 25701043. (Harley-Davidson) Harley-Davidson SWITCHBACK COLLECTION DERBY COVER BLACK 25701521

Because the primary cover style varies across model years and configurations, it’s always a good idea to verify fitment for your exact motorcycle before purchasing. This thorough compatibility ensures the derby cover installs cleanly without modification and maintains proper sealing with the engine’s primary case area. (Harley-Davidson)

Easy Installation & Included Hardware
The Switchback Derby Cover comes complete with mounting hardware and installation instructions, so you have what you need for a straightforward bolt‑on upgrade. While installation is generally accessible for experienced home mechanics, it’s worth noting that replacing engine covers may require new gaskets to maintain proper seals and prevent oil leaks — be sure to consult your service manual or dealer for torque specs and gasket recommendations. (Harley-Davidson) Harley-Davidson SWITCHBACK COLLECTION DERBY COVER BLACK 25701521

Custom Look, Expandable Theme
Part of the Switchback Collection’s appeal is its coordinated design language. You can pair this derby cover with other Switchback trim pieces — such as primary covers, timer covers, and other engine ornamentation — to build a unified, custom aesthetic that reflects your personal style and gives your motorcycle a cohesive, performance‑inspired theme. (Harley-Davidson) Harley-Davidson SWITCHBACK COLLECTION DERBY COVER BLACK 25701521

In summary, the Switchback Collection Derby Cover – Black Anodized (#25701521) combines premium materials, custom detailing, and official Harley‑Davidson quality into a standout trim piece that enhances your Softail motorcycle’s appearance while offering seamless OEM‑style fitment and installation. (Harley-Davidson) Harley-Davidson SWITCHBACK COLLECTION DERBY COVER BLACK 25701521