Forge blow off adapter BC Racing We tried a 40mm core

We tried a 40mm core and where it worked well but on track we could still see improvements were needed and so we opted for a huge 50mm core 'normally found on our Cosworth radiators' it was perfect

The system features a full 70mm bore size

Tapered and flowed end tanks/pipes to aid air flow

The DS2500 compound is designed for racing applications thanks to its excellent speed and temperature sensitivity characteristics but it can also be used for fast road use

Forge blow off adapter BC Racing We tried a 40mm coreAtmospheric Blow Off adapter specifically designed to fit the ST180. Simple in execution, yet offering the desirable atmospheric blow off valve sound, this product has been designed to be fully compatible with the engine management systems employed.