A.I.TECH AIT-DADO-5 Steel Coppered Nut 14x1,5 for VW / AUDI / PORSCHE / SEAT ymm_47 This allows the exhaust gases

This allows the exhaust gases to mix from both sides of the engine

Using a wideband air/fuel controller during the tuning process allows you to monitor AFR and adjust tuning parameters to optimize them for maximum power and efficiency

Further control over the sound of the Evolution Line (Titanium) exhaust system can be achieved by installing the optional Akrapovič Sound Kit

Valves: 2 (one per side of muffler)

A.I.TECH AIT-DADO-5 Steel Coppered Nut 14x1,5 for VW / AUDI / PORSCHE / SEAT ymm_47 This allows the exhaust gasesKnowledge from competition experience has led the manufacturer to use a dissimilar material for the nut from that for the wheel stud. The additional copper coating of the nut assures security. OD 25mm EX 19mm Spherical SEAT Total lenght 28mm