Coan Engineering 9in 245mm Competition Torque Converter — Fits GM TH350/TH400

SKU: BJBP_COA-20417-1
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Coan Edgineering

Coan Edgineering engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Coan Edgineering lineup with fast shipping and expert fitment support — order with confidence.

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Coan Engineering 9in Competition Torque Converter

The Coan Engineering 9-inch (245mm) Competition Torque Converter is the gold standard for racers looking to optimize their GM TH350 or TH400 transmission performance. Designed for serious competition, this unit features a lightweight 9-inch diameter that significantly improves throttle response and acceleration. If you are looking to shave time off your quarter-mile, this is the drivetrain upgrade you need.

Technical Specifications

  • Diameter: 9 inches (245mm)
  • Bolt Circle: 10.750 inches
  • Compatibility: GM TH350 and TH400
  • Heavy-duty construction for race use
  • Engineered for maximum efficiency

This competition converter is built to handle the high-torque demands of modern racing engines. The internal geometry is specifically tuned to provide the optimal stall speed for your specific application, ensuring your engine stays in its power band during critical launch phases. With a 10.750-inch bolt circle, it integrates seamlessly into existing race setups. Coan Engineering is a leader in transmission technology, and this converter reflects their commitment to quality and innovation. By reducing parasitic loss, you will notice a significant improvement in how your vehicle transfers power to the track. Invest in professional-grade hardware for your race car and see the results on the timing board. Find this and other high-performance parts at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Coan Edgineering

Coan Edgineering engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Coan Edgineering lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Coan Engineering 9in Competition Torque Converter

The Coan Engineering 9-inch (245mm) Competition Torque Converter is the gold standard for racers looking to optimize their GM TH350 or TH400 transmission performance. Designed for serious competition, this unit features a lightweight 9-inch diameter that significantly improves throttle response and acceleration. If you are looking to shave time off your quarter-mile, this is the drivetrain upgrade you need.

Technical Specifications

  • Diameter: 9 inches (245mm)
  • Bolt Circle: 10.750 inches
  • Compatibility: GM TH350 and TH400
  • Heavy-duty construction for race use
  • Engineered for maximum efficiency

This competition converter is built to handle the high-torque demands of modern racing engines. The internal geometry is specifically tuned to provide the optimal stall speed for your specific application, ensuring your engine stays in its power band during critical launch phases. With a 10.750-inch bolt circle, it integrates seamlessly into existing race setups. Coan Engineering is a leader in transmission technology, and this converter reflects their commitment to quality and innovation. By reducing parasitic loss, you will notice a significant improvement in how your vehicle transfers power to the track. Invest in professional-grade hardware for your race car and see the results on the timing board. Find this and other high-performance parts at GGCRACING.

Product Details

Product Description

About Coan Edgineering

Coan Edgineering engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Coan Edgineering lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Coan Engineering 9in Competition Torque Converter

The Coan Engineering 9-inch (245mm) Competition Torque Converter is the gold standard for racers looking to optimize their GM TH350 or TH400 transmission performance. Designed for serious competition, this unit features a lightweight 9-inch diameter that significantly improves throttle response and acceleration. If you are looking to shave time off your quarter-mile, this is the drivetrain upgrade you need.

Technical Specifications

  • Diameter: 9 inches (245mm)
  • Bolt Circle: 10.750 inches
  • Compatibility: GM TH350 and TH400
  • Heavy-duty construction for race use
  • Engineered for maximum efficiency

This competition converter is built to handle the high-torque demands of modern racing engines. The internal geometry is specifically tuned to provide the optimal stall speed for your specific application, ensuring your engine stays in its power band during critical launch phases. With a 10.750-inch bolt circle, it integrates seamlessly into existing race setups. Coan Engineering is a leader in transmission technology, and this converter reflects their commitment to quality and innovation. By reducing parasitic loss, you will notice a significant improvement in how your vehicle transfers power to the track. Invest in professional-grade hardware for your race car and see the results on the timing board. Find this and other high-performance parts at GGCRACING.

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