Rich
In case you haven't seen this before from CC...
Exhaust Options
Side Exit Cat
Standard on most models, the side exit cat is a 4-1 under-bonnet system, with a single pipe exiting the side of the engine bay. The catalytic convertor is integral with the silencer.
Competition Exhaust (except SV)
A basic 4-1 system as used by the Roadsport race series. In this type of system the four 'primary' pipes are of equal length. This means that each exhaust pulse from the four cylinders enters the single pipe of the silencer in sequence, for maximum efficiency. The four individual primary pipes exit the side panel, so requires the exit hole to be enlarged. This is not compatible with a catalytic convertor.
VHPD Competition Exhaust
Developed for the Superlight R and R400 race car, this system is similar to the competition exhaust but of a revised design. The collector is a 4 into 2 into 1 type, specifically designed to optimum engine performance. Silencers are available in 6" and 7" diameter. The collector can be interchanged with one that contains a catalytic convertor.
R300/R400/R500 Road Exhaust (except SV)
Initially developed for the R500, this 4-1 system uses finely tuned larger bore pipework to produce the best exhaust performance we have available. The silencer is 6" repackable type, with a lightweight titanium casing. The collector can be interchanged with one that contains a catalytic convertor.
R300/R400/R500 'Quiet' Exhaust
Based on the road system (above) the 'Quiet' exhaust uses a short collector to make room for a much longer, 7" repackable silencer. This helps reduce static and drive-by noise which can be important on some track days. The increased silencer enables this system to be used with the SV as well as the standard car. The collector can be interchanged with one that contains a catalytic convertor.
Bozz
McLaren Orange and Black 1.6SS 6 Speed here
Edited by - Bozz on 16 Dec 2006 18:08:42