极其简单

买个aftermarket，六七十刀。原装的一般较长，你需要加些管子。买的时候最好买管子尺寸差不多的。多问问seller.cement is/may be required to seal the gap between connecting pipes. Clamps are not as good as welding ,but would work. If you want to pass emission test, you have to run your car on highway for about one hour prior