The Regina 520 DR Extra Drag Racing Chain is engineered for the severe demands of high-performance drag racing. Designed for applications up to the Pro Stock level, this 140-link chain provides dependable power transfer and durability under intense acceleration and racing conditions. The chain uses a 520-size configuration and is identified by Regina manufacturer part number 135DR/1002 and vendor part number 135DR/1002.
Plates, pins, and rollers are shot-peened to improve fatigue resistance and help the chain withstand repeated high-load cycles. With a breaking strength of 10,566 pounds and a fatigue limit of 2,135 pounds, the Regina 520 DR Extra supports demanding racing setups when properly selected and installed for the vehicle. Its clip-and-rivet-style link is included for convenient installation and secure chain assembly.
Fitment is intended for compatible drag racing motorcycles and other 520-size chain applications requiring a 140-link configuration. Confirm sprocket compatibility, chain length, clearance, and the manufacturer’s installation requirements before use. The Regina brand is recognized for performance-oriented chain construction, making this model a suitable choice for racers seeking a purpose-built chain for severe drag racing service.
Features:
- Size: 520 drag racing chain configuration
- Model: DR Extra
- Link Count: 140 links
- Application: Designed for severe drag racing use up to Pro Stock level
- Construction: Plates, pins, and rollers are shot-peened for improved fatigue resistance
- Breaking Strength: 10,566 pounds
- Fatigue Limit: 2,135 pounds
- Link Type: Clip-and-rivet-style link included
- Brand: Regina
- Manufacturer Part Number: 135DR/1002
- Vendor Part Number: 135DR/1002
- Fitment: Compatible with properly matched 520-size drag racing applications