Both exhaust paths through the silencer are STRAIGHT-THRU unlike the factory design. When the exhaust valve is 'closed' the decibels are very controlled - but a different note from the factory - still won't upset the neighbours! When the valve is 'open' there is ZERO decibel control. It's a howling exhaust note, seriously addictive and surprisingly popular even here in the noise-averse UK.

I can build a resonance silencer into the link-pipe to take the edge off that - just put a note in the message box if you want that.

The valve operates exactly as factory - controlled by the ECU. 

Tip choice of 100mm diameter Stainless or Carbon - make a note in the message box please. Titanium tips - a volatile market with these at the moment but no harm in asking!