Drag Specialties Big Bore Piston for Twin Cam 3.875" Bore
Drag Specialties Big Bore Piston for Twin Cam 3.875" Bore
About this product
About this product
Experience a significant power boost for your Twin Cam engine with the high-performance Drag Specialties Big Bore Piston. Engineered for superior durability and increased displacement, this piston is an essential upgrade for riders seeking enhanced engine output.
Description
This premium Drag Specialties Big Bore Piston is meticulously crafted from OEM-quality cast aluminum alloy, ensuring exceptional strength and reliability for your motorcycle's engine. Designed specifically for Twin Cam models, this piston offers a substantial upgrade with its 3.875" bore and a +0.020" oversize, leading to increased engine displacement and improved performance. With a robust 10.25:1 compression ratio, it delivers a noticeable enhancement in power and throttle response, transforming your riding experience. The precision engineering guarantees a perfect fit and seamless integration, allowing for straightforward installation when paired with compatible rings. Trust Drag Specialties for components that meet the rigorous demands of motorcycle enthusiasts, providing a foundation for a more powerful and responsive ride.
Features & Highlights
- Enhanced Engine Performance: Specifically designed as a big bore piston for Twin Cam engines, increasing displacement for a significant boost in power and torque.
- Durable Cast Aluminum Construction: Manufactured from OEM-quality cast aluminum alloy, providing exceptional strength, heat resistance, and long-term reliability.
- Optimized Compression Ratio: Features a 10.25:1 compression ratio, delivering improved combustion efficiency for sharper throttle response and increased horsepower.
- Complete Piston Kit: Each kit includes two pistons, wrist pins, and clips, providing a comprehensive solution for a cylinder upgrade.
- Precision Fit and Finish: Engineered to exact specifications with a 3.875" bore and +0.020" oversize, ensuring a precise fit for optimal engine operation and longevity.
Technical Specifications
- Product Name: Piston
- Style: Big Bore
- Bore Size: 3.875"
- Bore Oversize: +0.020"
- Compression Ratio: 10.25:1
- Units: Each (Kit includes two pistons)
- Vendor Part Number: 22661-99A-020
Important to Know
- Requires piston rings: Accepts OEM or Hastings rings (sold separately).
Shipping & Return
Shipping & Return
Free shipping to GLS parcel shop parcel box for purchases over DKK 1,000.
GLS home delivery costs DKK 59.
We do our best to ship your order as quickly as possible. All orders are generally packed within 24 hours on weekdays.
There is a 14-day return policy. Read more
Specifications
22661-99A-020
Piston
Big Bore
3,875"
10.25:1
2.54 mm
2.54 mm
2.54 mm
+0.020"
Each
Reviews


Who is behind Parts Denmark
Martin and William are the duo behind Parts Denmark — an unlikely but awesome combo of a tech-savvy young IT wizard and a seasoned motorcycle guru who’s seen (and fixed) it all. Together, we’ve built a team with big ambitions, plenty of passion, and a shared mission to create great things — side-by-side with you.
Based in Denmark
Fast customer support
Over 100.000 Products
2-Year Full Warranty
Your peace of mind is our priority. Every product in our shop comes with a comprehensive 2-year warranty, so you can hit the road with full confidence.
Support in Danish, Swedish, German & English
Whether you are upgrading your exhaust or choosing a new helmet, our team of seasoned riders is ready to provide professional guidance for your specific bike.
Free Shipping Over 200€ (EU)
Shop your favorite gear without worrying about extra costs. We offer free shipping on all orders over 200€ (EU), ensuring your parts reach you safely and affordably.
Authorized Parts Europe Dealer
As a certified Parts Europe supplier, we guarantee 100% authentic, high-quality motorcycle parts and accessories directly from the world's leading manufacturers.

