It is often of larger pipe than the rest of the exhaust system. Power was reduced to for versions having catalytic exhaust system. This results in unburned fuel escaping through the exhaust system and into the environment. Fitting Diesel Pre Filters in exhaust system. They had much of the black plastic painted body color and special dual exhaust system. The exhaust manifold is the first component in the exhaust system. Standard were 4-wheel disc brakes and a stainless steel exhaust system. The YO-3A is equipped with an Asymmetrical Exhaust System. A NACA duct on the side provided cooling for the exhaust system. The pipes of the exhaust system feature a Zircotec black ceramic coating. Further, a switch from steel to titanium for the exhaust system reduces weight by . The intake and exhaust system also received a minor upgrade. The cars also had modified racing suspension and exhaust system. At the rear all Cadillacs adopted a through the bumper dual exhaust system. Wankel engines operate better with a low-pressure exhaust system.