Saab 9-3 muffler and tip, heavy duty clutch and pressure plate, stiffened and lowered springs, firmer dampers, as well as stronger CV joints and driveshafts. In 1999, the Viggen was the first 9-3 to use Saab's Trionic 7 engine management system. The 2001 model year introduced a Traction Control System (TCS). The TCS was later made available in the SE line. The car featured a rear wing that required relocating the radio antenna, aerodynamically designed bumpers and side skirts, special bolstered and colored leather seats (in four colors: black with black inserts (charcoal), black with blue inserts (deep blue), black with orange
Order-7-3 triangular honeycomb a uniform honeycomb, Schläfli symbol {∞,(7,∞,7)}, Coxeter diagram, , with alternating types or colors of cells. Order-7-3 triangular honeycomb In the geometry of hyperbolic 3-space, the order-7-3 triangular honeycomb (or 3,7,3 honeycomb) is a regular space-filling tessellation (or honeycomb) with Schläfli symbol {3,7,3}. It has three order-7 triangular tiling {3,7} around each edge. All vertices are ultra-ideal (existing beyond the ideal boundary) with infinitely many triangular tilings existing around each vertex in an heptagonal tiling vertex figure. It a part of a sequence of self-dual regular honeycombs: {"p",7,"p"}. It is a part of a sequence of regular honeycombs with order-7