The KRA Series Yamaha Spec Exhaust Spring is perfect for New Castle KRA Series Races with the CK4 Pipe and Header. It has an overall length of 70mm. You'll need 2 of these springs to attach the exhaust pipe to the header. Additionally, it's also suitable for IAME KA100 and IAME X30 Exhaust systems.

To use this exhaust spring, simply attach 2 springs to connect the exhaust pipe to the header. Make sure to check the 70mm length fits properly. When you're done racing, keep the springs clean and dry. Avoid exposing them to extreme temperatures or harsh chemicals. Regularly inspect the springs for any signs of wear or damage. If you notice any issues, replace the springs right away to keep your exhaust system working well.