The first point that stood out, was the catalyst design. 600 cell oem cats, and absolutely no balance present in the factory exhaust. replacing this unit for a 200 or 100 cell sports catalyst we were able to achieve some moderate power and torque gains. the second design alteration was to remodel the way in which the exhaust gases interact from opposing banks. Replacing the two piece design for a single piece with our trademark tight radius, laminar flow X pipe, we were able to alter the exhaust pitch, and smooth out the imbalance, this resulted in a far more high revving race car like sound.
The factory silencers, heavy, cumbersome, and restrictively chambered, produce a tinny note to the exhaust. We needed to enrich the sound, as well as improve gas transit, and simultaneously reduce weight. weight reduction and sound enrichment proved to be fairly straightforward with the simplification of the silencer design and removal of the multiple chambers. the addition of a single chamber volumetrically tuned towards low rev resonance, removed bass noise at cruising speeds, while a rich raucous vocal is achieved at hard throttle above 4000 rpm.
Cross sections in pre catalyst; 57mm OD chosen specifically to keep lambda ranges in A/F stoichiometry.
Post catalyst cross section; 63mm OD into 1D CLR tight radius X pipe.
Silencer sections; 63mm OD pre silencer, 57mm OD post silencer, single chamber with acoustic fill section.
Available in standard 304 grade stainless steel
silencers 6kg each
cat section 6.1kg
manifolds 4kg each
total full system +manifolds 26.1kg
Inconel 625, formula one grade exhaust material
silencers 3.8kg each
manifolds 1.9kg each
total full system + manifolds 14.9kg
Titanium G2 silencer sections are also available, weight is comparable with Inconel
100 cell or 200 cell HJS cats are used as standard.