Taken from the SuperSprint webpage;
SPORT SILENCERS / MUFFLERS
1) Precision finished joints and perfectly positioned brackets, for easy mounting and a flawless fit.
2) Heavy duty, stainless steel inlet tube, 1,5 mm thick.
3) Long lasting sound absorbing materials (Rock wool, with stainless steel wool wrap around silencer cores).
4) Free-flow silencer design, smooth-gas flow y-shape inner tube.
5) Aluminum plated steel silencer box, 1,5 mm thick.
6) Stainless steel, 1,2 to 1,5 mm thick inner perforated tubes.
7) Stainless steel, 1,0 mm thick, chrome plated tail pipes, with inward rolled edge, chosen from 19 different styles of design and shape, suited to each car model.
8) Stainless steel silencer endcaps.