on kits are also available to convert to 100% atmosphere venting. Use the recirc model for
direct factory replacement when you want the performance WITHOUT the noise!
Add the conversion kit when you want some noise with your performance! Factory bypass
valves have two main shortcomings – one is that they are typically designed to start opening
above a certain pressure to protect the engine, and the other is they are not optimised for
- 2004 Mitsubishi Lancer Evolution
- 2003 Mitsubishi Lancer Evolution