70mm Valved Track System
Okaaaaay - so UK trackday enthusiasts have to meet the toughest noise/db limits in the World. The Exige 380/Evora 400 Track exhaust silencer with its twin resonance chambers and no exhaust-valve, is a lot quieter than this one but some owners like to have some control over the noise. The standard 2bular 70mm Valved Road is definitely not track-friendly when the valve is open. IT managers won't understand most of the following but try to keep up.
I promised I wouldn't use an exhaust valve on a Track system but I can understand the attraction. This system weighs 15.5Kgs with all the extra pipework and the increase in physical size of the silencer itself to accommodate those all-important chambers. There are TWO totally separate exhaust paths through the silencer. It is a complete PITA to build - but if it were easy, anyone could do it!
When the valve is closed this system will be as quiet as the factory design but NOT as restrictive. When the valve is open, the TWO resonance chambers come into play along with the 70mm internal pipework - much quieter than the popular 2bular 70mm Road valved system which had zero silencing effect when that valve was open. Still lighter than the factory system but ...... a little bit heavier than I would like for a Track exhaust.
I decided to move the valve to a less vulnerable position - AFTER the catalyser and the silencer. Some energy/heat removed from the exhaust gases. i.e. The way all the supercars have it. The vacuum hard-pipe is easily re-routed to the right hand side of the exhaust bay. Placing a rotating mechanical device into the 600C. exhaust gas-flow of a supercharged 3.5Ltr V6 is madness enough - might as well try to mitigate those stresses as much as possible!
SUPPLIED WITH ITS OWN V-BANDED LINK-PIPE FOR EARLY AND LATER MODELS.
LEAD TIME - I HAVE BUILT A BATCH OF THE SILENCERS SO THE TIME-CONSUMING PART IS ALREADY DONE. PLEASE CONTACT ME BEFORE BUYING FOR A FIRM DELIVERY DATE.