TST WORX V2 Velocity Stacks 18-23 Kawasaki Ninja 400/Z400

TST WORX V2 Velocity Stacks 18-23 Kawasaki Ninja 400/Z400

TST made waves in the Ninja 400 racing scene with our 2020 ASRA Moto3 National Championship winning machine, and we aim to do the same with our new 2024 Kawasaki Ninja 500. By adapting the technology that we developed on the Ninja 400 platform to the updated Ninja 500, we've unlocked hidden performance that can provide the edge you need to win the race. Through an extensive research and testing process, we were able to determine the most effective velocity stack lengths for overall power increase using the natural resonant frequencies of the Ninja's intake to develop the greatest volumetric efficiency. All of that work has resulted in a 7.69% peak power horsepower gain when compared to the same Ninja 500 using OEM velocity stacks. That's a significant performance boost that can help you land your race boots on the podium. Installation is an easy bolt-on process, which means that real-world power gains are easy to achieve and leave the ability to return to the stock setup if the need ever arises. Each Velocity Stack set is made from a chemical-resistant compound capable of withstanding gasoline and other harsh chemicals found in the extreme environment of your Kawasaki Ninja 500's engine.

Features

• Provides a 5.8% increase in peak power at 10.93 RPM*
• Designed to specifically provide increased top end power
• Supersport legal in CCS and ASRA
• Simple and easy installation that does not require any special tools
• No modification required for installation
• Manufactured from chemical-resistant material to withstand gasoline and other harsh chemicals
• Developed through extensive research and testing by the TST Industries WORX Racing Program

Demonstrated power gains were achieved using a Ninja 400 outfitted with WORX V2 Velocity Stacks and comparing them to the same bike outfitted with OEM velocity stacks.

Returns & Exchanges

If you are not completely satisfied with your purchase, you may return the item within 30 business days of receipt. While we offer a hassle-free return policy, some non-defective items may be subject to a 15% restocking fee.

Returned items must be:

• New and unused
• In original condition
• In the manufacturer’s original packaging
• Include all tags

Returns due to manufacturer defects will be accepted only if the customer provides photographic evidence showing the issue was not caused by misuse.

Non-Returnable Items

• Electrical components
• Special or made-to-order items
• Windscreens
• Bodywork
• Carbon fiber parts
• Closeout items
• Used parts
  

Customers are responsible for all return shipping costs.

Once your return is received and inspected, refunds will be processed within 24–48 hours to the original payment method (minus shipping fees). Please allow an additional 2–8 business days for the refund to appear on your account.

Before returning any item, please contact us at support@motostarz.com or call 1-236-481-2222 to obtain a return authorization number. This number must be clearly marked on both the inside and outside of the package.