70mm Valved Track System
Okaaaaay - so UK trackday enthusiasts have to meet the toughest noise/db limits in the World.
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 resonance 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!
THIS IS A STRAIGHT-THRU PERFORMANCE EXHAUST - NO POWER LOSS.
When the valve is closed this system is 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. Lighter than the factory system and any other aftermarket valved exhaust but ...... a little bit heavier than I would like.
Drive-by noise reading (without the 2bular tailpipe add-on silencers) was below 101dbs at Silverstone circuit. The add-on silencers would drop another 3dbs at least. They are not road-legal though - just for track use.
Track use is abuse. 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.
PLEASE CONTACT ME BEFORE ORDERING FOR A FIRM DELIVERY DATE.
NON-UK/EU (NO VAT) PRICE: 1648 :00GBP