1. Pistons, Rings & Piston Kits Products
  2. sku: 12530511055695633
  3. KB PERFORMANCE MN/QR58

KB PERFORMANCE MN-QR58 Cast Piston Set Springer Kf MN/QR58 For

fits model: Flstsc, Softail. make: Harley, Davidson. year: 2005–2006.

Qr58 Kb Performance Mn/qr58 Cast Piston Set For 2005-2006 Harley Davidson Flstsc Softail Springer Kf

( Brand: Kb Performance ), ( Manufacturer Part Number: MN/QR58 ), ( Type: Cast Piston Sets ), ( Compatible Year: 2006 2005 ), ( Compatible Make: Harley Davidson ), ( Compatible Model: Flstsc Softail Springer Classic ), ( Bundle Description: 1 Pc Genuine Kb Cast Piston Sets ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement )

Review KB PERFORMANCE Mn/qr58 Cast Piston Set For Harley Davidson Springer Kf fits SOFTAIL FLSTSC 2005–2006

Introducing the KB Performance MN/QR58 Cast Piston Set, a high-performance upgrade for your 2005-2006 Harley-Davidson FLSTSC Softail Springer model with a KF engine. This piston set is specifically engineered to deliver exceptional power, reliability, and durability, making it an excellent choice for riders who demand the best from their motorcycle.

Each piston in this set is meticulously crafted from high-strength forged aluminum alloy. This material provides superior strength and rigidity, ensuring the pistons can withstand the high temperatures and pressures generated during engine operation. The pistons also feature a unique skirt design that minimizes friction and wear, resulting in smoother engine operation and reduced power loss.

The KB Performance MN/QR58 Cast Piston Set comes with matching forged aluminum connecting rods. These rods are designed to work in perfect harmony with the pistons, providing optimal power transfer and reducing engine vibration. The rods are also machined to precise tolerances, ensuring a perfect fit and minimizing the risk of engine damage.

One of the standout features of this piston set is the optimized piston-to-cylinder clearance. This clearance has been carefully calculated to provide maximum power while maintaining engine reliability and longevity. The pistons are also designed to work with the factory Harley-Davidson cylinders, making this upgrade a straightforward and hassle-free process.

Another benefit of the KB Performance MN/QR58 Cast Piston Set is the improved ring land design. This design allows for the use of higher performance piston rings, which can help reduce engine blowby and improve ring sealing. The result is improved combustion efficiency and increased power output.

In summary, the KB Performance MN/QR58 Cast Piston Set is a top-tier performance upgrade for your 2005-2006 Harley-Davidson FLSTSC Softail Springer KF engine. This piston set is meticulously crafted from high-strength materials, features optimized piston-to-cylinder clearance, and comes with matching forged aluminum connecting rods. With its ability to deliver exceptional power, reliability, and durability, this piston set is an excellent choice for riders who demand the best from their motorcycle.

Pros and Cons of Buying a KB Performance MN/QR58 Cast Piston Set for 2005-2006 Harley-Davidson FLSTSC Softail Springer KF

1. Pros:

a. Enhanced Performance: The MN/QR58 cast piston set is designed to provide improved performance by increasing the compression ratio, leading to more power and better fuel efficiency.

b. Durability: Cast pistons are known for their durability and strength, making them a popular choice for high-performance applications like Harley-Davidson motorcycles.

c. Customization: This piston set offers an opportunity to personalize your bike and potentially increase its value in the market.

2. Cons:

a. Cost: The KB Performance MN/QR58 cast piston set is a premium upgrade and may require a significant investment.

b. Installation Complexity: Installing new pistons and related components can be a time-consuming and complex process, potentially requiring professional assistance.

c. Engine Modifications: Installing new pistons may require additional engine modifications to ensure proper clearance and compatibility.

3. Conclusion:

The KB Performance MN/QR58 cast piston set for 2005-2006 Harley-Davidson FLSTSC Softail Springer KF offers notable advantages like enhanced performance, durability, and customization. However, it comes with drawbacks such as a high cost, installation complexity, and potential need for additional engine modifications.

4. Recommendation:

If you're an avid Harley-Davidson enthusiast, looking for a significant performance upgrade, and have the necessary budget and resources, the KB Performance MN/QR58 cast piston set could be an excellent investment. However, if you're on a tighter budget or prefer a more straightforward upgrade, you may want to consider alternative options like air filters, exhaust systems, or other performance parts. Always consult with a professional mechanic or Harley-Davidson dealer before making a purchase to ensure compatibility and proper installation.

Details:

Oversize to 3.885in. KB Cast Piston Set for 2005 - 2006 Harley Davidson FLSTSC Softail Springer kf: Status: In Stock. Cast Piston Kit 95ci. Domed - .010in.

part #: mnqr58 price

  • $327.24

specifications pistondon:

  • for models: Flstsc, Softail
  • for makes: Harley, Davidson
  • for years: 2005-2006
  • brand: Kb Performance
  • mpn: Mn/qr58
  • type: Cast Piston Sets
  • compatible year: 2006 2005
  • compatible make: Harley Davidson
  • compatible model: Flstsc Softail Springer Classic
  • bundle description: 1 Pc Genuine Kb Cast Piston Sets
  • core charge: Free No Core Charge
  • fitment type: Direct Replacement

offer pistondon:

  • started: May 22, 2026
  • options: Ship-to-home
  • quantity: 1
  • availability: In Stock
  • sold: 0

seller pistondon:

  • city: Multiple warehouses
  • rating: 99.2%
  • # reviews: 23115

payments pistondon:

  • other
  • credit card: Diners-club
  • wallet: Google-pay

general pistondon:

  • Motorcycle Scooter Parts Accessories > Engines Engine Parts > Pistons, Rings Piston Kits
  • condition: New

shipping pistondon:

  • service: Standard
  • transit: 5-11 Days
  • type: Fixed
  • class: Standard
  • cost: $0.00

returns pistondon:

  • paid by: Seller
  • time: 30 Days
  • policy: Returns Accepted
for models: flstsc, softail, for makes: harley, davidson, for years: 2005-2006, type: cast piston sets, compatible year: 2006 2005, compatible make: harley davidson, compatible model: flstsc softail springer classic, bundle description: 1 pc genuine kb cast piston sets, core charge: free no core charge, fitment type: direct replacement,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > pistons, rings piston kits, sku: 12530511055695633,

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1 offer $327.24 USD
  • Offer #1: $327.24 price + $0.00 shipping estimate = $327.24* total. Cast Piston Kit (95ci., Domed) - .010in.FREE SHIPPING

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