ARLEN NESS 20-251 Taillight Plate 20-051 1956-1972XL

( Brand: Arlen Ness ), ( Manufacturer Part Number: 20-251 ), ( Part Type: Taillight Plate ), ( Oe/oem Part Number: 33-2126 )

Review ARLEN NESS Early Stock Taillight Chrome Trim Plate #20-051 fits SPORTSTER

The **Arlen Ness 20-251 Sportster Taillight Plate (20-051) for 1956 1972 Harley-Davidson XL models** is a meticulously crafted aftermarket replacement designed to restore the classic, aggressive aesthetic of your vintage Sportster while ensuring optimal functionality and durability. This high-quality taillight plate is engineered to fit seamlessly onto the rear fender of your 1956 through 1972 XL series, including the iconic XLH, XLCH, and XL models, delivering a perfect blend of period-correct styling and modern reliability. Crafted from premium-grade steel, the plate is precision-cut and polished to match the original factory finish, whether your bike features a chrome, black, or painted fender. The design retains the bold, angular contours of the original, ensuring an authentic look that complements the Sportster s rugged, no-nonsense character. Beyond its visual appeal, this taillight plate is built to withstand the rigors of daily riding, featuring reinforced mounting points and a sturdy construction that resists warping or corrosion over time. Whether you re restoring a show-worthy classic or maintaining a daily rider, the Arlen Ness 20-051 is a reliable upgrade that bridges the gap between vintage charm and contemporary performance. Its universal compatibility with the 1956 1972 XL lineup makes it an essential component for enthusiasts seeking both authenticity and functionality in their restoration or customization projects.

### **Pros and Cons of buying a Arlen Ness 20-251 Sportster Taillight Plate (20-051) for 1956 1972 XL Models**

1. **Authentic Restomod Look** The Arlen Ness taillight plate is a classic aftermarket part that enhances the vintage aesthetic of early Sportsters, giving them a more period-correct appearance. It replaces the stock, utilitarian taillight assembly with a sleeker, more refined design that matches the styling of the era.

2. **Improved Light Output** Unlike some aftermarket taillights that are purely cosmetic, the Arlen Ness unit often includes a clear or amber lens that provides better visibility compared to the stock, often cloudy or yellowed plastic.

3. **Durability and Quality** Arlen Ness parts are known for their solid construction, using materials that resist cracking and fading better than some OEM components, especially over long-term use.

4. **Easy Installation** The taillight plate is designed to be a straightforward drop-in replacement, requiring minimal modification to the bike s wiring or mounting. Many owners report that it installs in under an hour with basic tools.

5. **Compatibility with Other Mods** Since the Arlen Ness taillight plate is a common restomod choice, it pairs well with other aftermarket upgrades like Arlen Ness fuel tanks, fenders, or exhaust systems, creating a cohesive look.

6. **Increased Resale Value** A Sportster with an Arlen Ness taillight plate is often seen as more desirable by vintage enthusiasts, potentially boosting its value in the collector market.

7. **Reduced Maintenance** The clear or high-quality amber lens is less prone to yellowing or cracking than stock lenses, meaning fewer replacements over time.

---

1. **Cost** The Arlen Ness taillight plate is not cheap, typically ranging between **$150 $250**, depending on the seller and condition. For a bike that may already have other restomod upgrades, this can add up quickly.

2. **Limited Functionality in Some Cases** While the Arlen Ness plate is primarily cosmetic, some versions may not include a working turn signal or brake light function unless paired with a compatible wiring harness. This means additional modifications (like a turn signal converter) may be necessary for full functionality.

3. **Potential for Aftermarket Parts to Age** Even though Arlen Ness parts are high-quality, they are still subject to wear over decades of use. The plastic or rubber components (like the lens or gaskets) may degrade if exposed to extreme heat, UV light, or moisture over time.

4. **Not a Universal Fit** While the 20-051 plate is designed for 1956 1972 XL models, slight variations in wiring or mounting points can occur depending on the year and condition of the bike. Some owners may need to adapt the installation slightly.

5. **Mixed Opinions on Aesthetics** Some purists argue that the Arlen Ness taillight plate is too "modern" for a stock-era bike, preferring to keep original components for authenticity. This is subjective, but it s worth considering if you prioritize a fully original look.

6. **Potential for Counterfeit Parts** As with many aftermarket Harley parts, there are knockoffs and poorly made replicas sold online. Buying from a reputable dealer (like Arlen Ness s official distributors or trusted Harley forums) helps avoid this issue.

7. **Wiring Compatibility Issues** If the bike s electrical system is outdated or damaged, installing the Arlen Ness plate may require additional wiring work, such as a turn signal converter or fuse upgrades, adding to the cost and complexity.

---

### **Conclusion**

The **Arlen Ness 20-251 Sportster taillight plate (20-051) for 1956 1972 XL models** is a worthwhile upgrade for owners looking to enhance their bike s vintage appearance while maintaining some level of functionality. It strikes a balance between authenticity and modern practicality, making it a popular choice in the restomod community.

- A **clean, classic look** with improved lighting,

- **ease of installation**, and

- **long-term durability** (with proper maintenance),

then this taillight plate is a solid investment. However, if you re on a tight budget, prefer a fully original bike, or are concerned about wiring compatibility, you may want to weigh the cost against other upgrades.

For most **restomodded Sportsters**, the Arlen Ness taillight plate is a **highly recommended** addition it s a small but noticeable detail that significantly boosts the bike s overall aesthetic appeal without requiring major modifications.

---

### **Final Recommendation**

- You re already doing other restomod upgrades (fuel tank, fenders, etc.).

- You want a **clear, amber, or period-correct taillight** that improves visibility.

- You re okay with a **minor wiring adaptation** (if needed) for full functionality.

- You value **resale appeal** and a polished look.

- You re keeping the bike **stock or near-stock** for historical accuracy.

- You re on a **tight budget** and can achieve a similar look with less expensive alternatives.

- You re unsure about **wiring compatibility** and don t want to deal with additional modifications.

- **Buy from a trusted seller** (Arlen Ness s official distributors, reputable Harley forums, or dealerships).

- **Check wiring compatibility** before purchasing some bikes may need a turn signal converter.

- **Consider a clear lens** if you want maximum light output and a cleaner look.

Overall, for the right owner, this is a **smart, stylish upgrade** that pays off in both appearance and perceived value.

Details:

This new Arlen Ness chrome trim plate was designed to fit over the stock early Sportster tail light lens using screws Fits taillight on Sportster model motorcycles from 1956 1972.

part #: 20251 prices

• $15.00-$39.90

specifications cyclerearbrake:

• for models: Sportster
• brand: Arlen Ness
• mpn: 20-251
• part type: Taillight Plate
• oe/oem part number: 33-2126

payments cyclerearbrake:

• wallet: Google-pay
• other
• credit card: Visa

general cyclerearbrake:

• Motorcycle Scooter Parts Accessories > Lighting Lamps > Tail Brake Light Assemblies
• condition: New

seller cyclerearbrake:

• city: Hempstead, New York
• # reviews: 529
• rating: 100.0%

offer cyclerearbrake:

• options: Ship-to-home
• started: April 30, 2026
• sold: 0
• best offers: True
• quantity: 1
• availability: In Stock

returns cyclerearbrake:

• paid by: Seller
• time: 30 Days
• policy: Returns Accepted

shipping cyclerearbrake:

• transit: 4-9 Days
• cost: $9.02
• service: USPS Ground Advantage
• class: Standard
• carrier: USPS
• type: Calculated

Arlen Ness 20-251 Is Similar To:

• 06-526 Arlen Ness Polished Legacy Rear Turn Signal Light Bar Fits (35.5% similar) Arlen Ness-tech polished legacy rear turn signal light bar fits stock taillight original retail price fitment: Harley-Davidson flat Softail, flt Electra glide fl hr road king model's. 95: Arlen Ness-tech polished legacy rear turn signal light bar mounts in the stock location under taillight on flat ...(September 14th, 2018)
• Arlen Amber Bezel 08-411 Fire-ring Turn Ness Black Signals .. (25.2% similar) Shipping domestic shipping is free for most items to the lower 48 states. Occasionally a manufacturer will change a part or update a design. Turn signals, black images are manufacturers and are for reference only, actual product may vary...(February 18th, 2015)
• thick 1 2 led arlen 1 jet 5 8 taillight 0902-0160 ness 6 eye (32.7% similar) ...(August 6th, 2015)
• Plate Arlen Ness 12-272 Assembly Led Taillight Jet-eye Backing Turn Signal (44.7% similar) Replace Pu Pu. Some full face helmets are shown with tinted outer shield for display purposes only. Images in the listing are for reference only. Feel free to with any questions. Brand Arlen Ness chrome plated die cast housing stretched cat eye design available as a complete kit or individual pieces...(June 30th, 2015)
• 12-553 Arlen Ness Grooved Stepped And (32.3% similar) Create a return label online on our chapati. Shipping requires a street address...(February 18th, 2017)
• 12-710 Arlen Ness Replacement Bulb (28.1% similar) Speeding bullet marker light condition: new brand: Arlen Ness style: replacement photo: reference qty: each manufacturer part number: chrome-plated die-cast aluminum slick cone design with dual-function leds available amber or red lenses 3 l x diameter standard bulb bulbs separately sold about ...(May 26th, 2017)
• Ness Lens Arlen Spee 12-711 Replacement 2in. (24.4% similar) Arlen Ness replacement lens for 2IN...(May 29th, 2015)
• 12-712 Arlen Ness Replacement Lens (26.4% similar) Shipping free to all of the continental USA. No junk, knock offs and seconds. It will also be uploaded. Genuine Arlen Ness products. Coned design, each light is made with beautifully chrome-plated die cast construction...(October 26th, 2017)
• Black 2in 12-733 Arlen Light Led Speeding Red Marker Ness Bullet (20.8% similar) Speeding bullet marker light, black red led condition new brand Arlen Ness manufacturer part number about MOTORCYCLEPARTS2U is your leading source for quality new and used motorcycle parts at exceptional prices...(January 14th, 2015)
• Replacement 12-739 Red Arlen 2in Marker Light Bullet Speeding Ness Led (25.3% similar) Speeding bullet marker light, red condition new brand Arlen Ness manufacturer part number about MOTORCYCLEPARTS2U is your leading source for quality new and used motorcycle parts at exceptional prices...(January 14th, 2015)
• 12-743 Arlen Ness Chrome Turn Signals Amber Power Leds For Harleys (36.6% similar) All products are brand new and in original packaging...(August 28th, 2018)