• scion xb aftermartket parts are intended to replace the factory fitted  components of an automobile (or motorcycle or other vehicle) in order to gain a performance increase. Some aftermarket parts are designed to improve the look and sound of the car, rather than its performance. In general, the goal of aftermarket exhaust systems is to increase the engine power by reducing the back pressure of the factory exhaust system. Frequently a side effect of a free-flowing exhaust system is the increased engine sound, which is desirable to some people. Aftermarket exhaust parts can also be a styling upgrade by change the visible parts of xb the exhaust like the exhaust tips.Mileage can be increased. xb
• Engine sound is more noticeable. xb
• Factory or OEM replacement part is not available (or is more expensive) xb
• Aftermarket part is available in stainless steel (but OEM part is not) xb

Switching from an exhaust  to exhaust headers (also known as extractors in Australia) will xb optimize the exhaust gas flow speed and in turn increase the high-end xb  power of the engineThis is done by using an individual pipe for each exhaust port that has smoother bends, xbdecreasing airflow resistance, as well as a calculated pipe diameter to obtain a good scavenging effect for the specific engine capacity. The pipes then merge together into a collector and then flow into a larger pipe (down pipe), just before the catalytic converter. With equal length headers, as each exhaust valve in the head of the engine is opened and exhaust gas is forced out, it passes down one of the header pipes and through to the down pipe, where the exhaust gas velocity causes a slight vacuum in another header pipe. This has an effect of scavenging exhaust gas from the cylinder, which is beneficial for performance.xb  In performance engines, which have cam overlap, the scavenging effect will pull air through from the intake manifold xb

While it was common for the stock or factory automotive exhaust system to be made from ordinary (and sometimes "aluminized") steel, some manufactures (such as Chrysler) have been using stainless steel for the entire exhaust system (pipes, mufflers, resonators) since the mid to late 1990s. The use of stainless steel has made it possible for the xb  exhaust system to last for practically the entire life of an xbautomobile. This is a xb