VANCE HINES MN-TRJ7 Skullcap Pm MN/TRJ7 VO2

( Brand: Vance Hines ), ( Manufacturer Part Number: MN/TRJ7 ), ( Color: Chrome ), ( Compatible Year: 2013 2012 2011 2010 ), ( Compatible Make: Harley Davidson ), ( Compatible Model: Fltrx Road Glide Custom ), ( Bundle Description: 1 Pc Genuine Vance Hines Vo2 Skullcap Crown ), ( Type: Vo2 Skullcap Crown ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement )

Review VANCE HINES Mn/trj7 And Vo2 Skullcap Harley Davidson Pm fits CROWN ROAD FLTRX 2010–2013

The **Vance Hines MN/TRJ7 VO Skullcap Crown** is a meticulously engineered, high-performance aftermarket exhaust system designed exclusively for the 2010 2013 Harley-Davidson FLTRX Road King and Road Glide models equipped with the **Milwaukee-Eight 883cc V-Twin engine**. This premium exhaust solution combines cutting-edge technology with timeless Harley-Davidson styling to deliver an unparalleled blend of power, efficiency, and aesthetic appeal. Crafted from **high-grade 304 stainless steel**, the VO Skullcap Crown features a **dual-tone, matte-black and polished finish**, giving it a bold, aggressive presence that turns heads while maintaining a sleek, modern look. The system incorporates Vance Hines proprietary **VO (Variable Oxygen) technology**, which dynamically adjusts exhaust flow based on engine load, optimizing both power output and fuel efficiency without sacrificing torque or responsiveness. This intelligent tuning ensures a smoother, more refined throttle response, particularly noticeable in the mid-range where the Milwaukee-Eight excels, while also reducing backpressure for improved exhaust scavenging.

At the heart of the VO Skullcap Crown is the **MN/TRJ7 manifold**, a precision-machined, high-flow design that enhances cylinder scavenging and exhaust pulse timing, resulting in a more aggressive yet controlled exhaust note. The **skullcap crown** itself is a striking, angular piece that replaces the stock muffler, featuring a **custom-shaped, perforated outer shell** that diffuses sound while maintaining a deep, resonant growl ideal for riders who crave a bold exhaust tone without the harshness of a straight-pipe setup. The system is backed by Vance Hines **lifetime warranty**, ensuring durability against corrosion and wear, and is designed for easy installation with minimal modifications required. Whether cruising on the highway or navigating city streets, the VO Skullcap Crown transforms the FLTRX into a more dynamic, performance-oriented machine while preserving the iconic Harley-Davidson character that riders love. Perfect for enthusiasts seeking a balance of power, efficiency, and style, this exhaust system is a standout choice for those who demand the best from their Harley.

### **Pros and Cons of Buying a Vance Hines MN/TRJ7 VO2 Skullcap Crown for a 2010 2013 Harley-Davidson FLTRX Road PM**

1. **Enhanced Aerodynamics and Cooling**

The Vance Hines MN/TRJ7 VO2 Skullcap Crown is designed to improve airflow over the engine, reducing drag and helping with heat dissipation. This can lead to better throttle response, especially in high-speed cruising or sustained riding.

2. **Improved Engine Performance**

The VO2 (Variable Oxygen) system adjusts airflow dynamically based on engine load, which can optimize power delivery and fuel efficiency. This is particularly beneficial for the FLTRX s V-twin, which benefits from better scavenging and reduced backpressure.

3. **Reduced Engine Noise**

The skullcap design helps dampen some of the engine s mechanical noise, contributing to a slightly quieter ride though it won t eliminate the raw Harley sound entirely.

4. **Compatibility with Stock and Aftermarket Parts**

The VO2 system is designed to work seamlessly with the stock Harley exhaust and can also pair well with aftermarket exhausts (like Akrapovic or Scorpion) if upgraded later. It s a modular solution that doesn t require major modifications to the stock setup.

5. **Legal Compliance in Many Areas**

Unlike some high-flow exhaust systems, the VO2 Skullcap Crown typically meets emissions standards in most U.S. states, making it a more practical choice for daily riding without risking legal issues.

6. **Durability and Build Quality**

Vance Hines products are known for their robust construction, using high-quality materials like stainless steel and heat-treated components. This ensures longevity, especially when properly maintained.

7. **Minimal Installation Complexity**

The skullcap is a bolt-on replacement for the stock air cleaner housing, requiring no major disassembly. Installation is relatively straightforward for someone with basic mechanical skills.

8. **Potential Fuel Efficiency Gains**

By optimizing airflow and scavenging, the VO2 system can improve combustion efficiency, which may lead to slight fuel economy improvements though the FLTRX is already a fuel-hungry bike, so gains may be modest.

9. **Aesthetic Appeal**

The skullcap maintains a stock-like appearance while still offering performance benefits. It s a subtle upgrade that doesn t drastically alter the bike s look.

10. **Backed by a Reputable Brand**

Vance Hines has a strong reputation in the custom Harley community for producing high-quality, performance-focused parts. Their products are widely trusted by riders and mechanics alike.

---

1. **Cost**

The Vance Hines VO2 Skullcap Crown is not a cheap upgrade. Prices typically range between **$800 $1,200**, depending on whether it s new or used. This is a significant investment for a performance part, especially when weighed against other potential upgrades (e.g., exhaust, camshafts, or fuel system mods).

2. **Limited Power Gains**

While the VO2 system improves airflow and scavenging, it does not produce dramatic horsepower or torque increases especially on a stock FLTRX. Expect modest gains (perhaps **5 15 HP** and **10 20 lb-ft of torque**) depending on tuning and other modifications. For serious power seekers, this may not be enough to justify the cost.

3. **Requires Tuning for Full Benefits**

To realize the VO2 s potential, the bike s ECU (Engine Control Unit) must be tuned to account for the increased airflow. This means an aftermarket tune (e.g., from **Harley-Davidson Performance, Walbro, or a local tuner**) is necessary, adding **$200 $500** to the total cost. Without tuning, the gains will be minimal.

4. **Potential for Increased Exhaust Backpressure**

If not paired with the correct exhaust system, the VO2 could create slight backpressure issues, which might negate some of its benefits. This is why it s often recommended to pair it with a high-flow exhaust (e.g., **Vance Hines MN/TRJ7 exhaust** or another reputable brand).

5. **Maintenance Considerations**

The VO2 system introduces slightly higher airflow, which can accelerate wear on components like **valves, valve springs, and piston rings** over time. This means more frequent maintenance (e.g., valve adjustments, oil changes) may be necessary to keep the engine running smoothly.

6. **Not a Standalone Solution for Performance**

The FLTRX is already a powerful bike, and the VO2 system is just one piece of the performance puzzle. For meaningful power gains, other upgrades (e.g., **cams, fuel injectors, headers, or a supercharger**) would likely be needed, making the VO2 a smaller part of a larger mod package.

7. **Potential for Overcomplicating the Bike**

Adding a VO2 system to a stock FLTRX can make future modifications more complex. For example, if you later install a high-flow exhaust or a supercharger, the ECU may need additional tuning to compensate for the VO2 s settings.

8. **Resale Value Impact**

While the VO2 is a desirable upgrade, it may not significantly boost the bike s resale value. Buyers looking for stock or lightly modified FLTRXs might not prioritize this specific mod, so the return on investment could be limited.

9. **Learning Curve for Installation**

While the installation is straightforward, those unfamiliar with Harley-Davidson engines may find it challenging. Mistakes during installation (e.g., improper gasket sealing, sensor misalignment) could lead to performance issues or even engine damage.

10. **Compatibility with Other Mods**

If the bike has other performance mods (e.g., **headers, big bore kit, or a supercharger**), the VO2 system may need additional tuning to avoid conflicts. This can complicate the tuning process and increase costs.

---

### **Conclusion and Recommendation**

The **Vance Hines MN/TRJ7 VO2 Skullcap Crown** is a **high-quality, bolt-on performance upgrade** that offers **modest but meaningful improvements** in airflow, cooling, and engine efficiency for the 2010 2013 FLTRX Road PM. It s a **smart choice** if you want to **enhance your bike s breathing without drastic modifications**, improve throttle response, and maintain a **stock-like appearance**.

However, it is **not a magic bullet** it won t turn your FLTRX into a supercharged monster, and the **cost of installation and tuning** must be weighed against the expected gains. If you re already planning a **larger mod package** (e.g., exhaust, camshafts, fuel system upgrades), the VO2 is a **good complementary addition**, but it may not be worth the investment on its own.

#### **Who Should Buy It?**

- Riders who want **subtle but noticeable performance improvements** without major modifications.

- Those who prioritize **aerodynamics, cooling, and engine longevity** over raw power.

- Buyers who plan to **keep the bike stock or lightly modified** and want a **bolt-on upgrade** that s easy to install.

- Enthusiasts who value **Vance Hines reputation for quality** and want a **reputable, well-supported product**.

#### **Who Should Skip It?**

- Those looking for **dramatic horsepower gains** consider **headers, cams, or a supercharger** instead.

- Riders on a **tight budget** the cost may not justify the modest gains.

- People who plan to **heavily modify the exhaust or fuel system** later, as the VO2 may require additional tuning.

- Those who prefer **minimal changes** and don t want to deal with tuning or maintenance adjustments.

If you re **satisfied with your FLTRX s stock power but want better airflow, cooling, and efficiency**, the **Vance Hines VO2 Skullcap Crown is a solid upgrade**. Pair it with a **proper tune** and consider pairing it with a **high-flow exhaust** for the best results. However, if you re **serious about maximizing power**, allocate your budget toward **more impactful mods** like **headers, cams, or a supercharger**.

For the **average FLTRX owner**, the VO2 is a **worthwhile investment** just don t expect it to revolutionize your bike s performance. **Install it, tune it properly, and enjoy the smoother, more responsive ride.**

Details:

part #: mntrj7 price

• $105.09

specifications intakefuelmotorcycle:

• for models: Fltrx, Crown, Road
• for makes: Harley, Davidson
• for years: 2010-2013
• brand: Vance Hines
• mpn: Mn/trj7
• color: Chrome
• compatible year: 2013 2012 2011 2010
• compatible make: Harley Davidson
• compatible model: Fltrx Road Glide Custom
• bundle description: 1 Pc Genuine Vance Hines Vo2 Skullcap Crown
• type: Vo2 Skullcap Crown
• core charge: Free No Core Charge
• fitment type: Direct Replacement

returns intakefuelmotorcycle:

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

seller intakefuelmotorcycle:

• # reviews: 23123
• city: Multiple warehouses
• rating: 99.2%

payments intakefuelmotorcycle:

• other
• credit card: Diners-club
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• class: Standard
• type: Fixed
• service: Standard
• cost: $0.00

offer intakefuelmotorcycle:

• quantity: 1
• availability: In Stock
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• options: Ship-to-home
• started: May 22, 2026

general intakefuelmotorcycle:

• Motorcycle Scooter Parts Accessories > Air Intake Fuel Delivery > Other Air Intake Fuel Delivery
• condition: New

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