Complete exhaust stainless steel system with carbon titanium cone silencer and two removable dB killers. US specification comes with 270 mm silencer and combine all db killers together for 100 dBa. It is possible to purchase a simple replacement silencer that meets the noise limit of 98 dBa for the system (special order). After installation, the fuel map must be tuned. The manifold includes an M 18 x 1.5 lambda in the 3rd sensor location for no CEL.