GrimmSpeed Subaru WRX/STI 3" Catback Adapter - What's in the Box?

https://www.rallysportdirect.com/part... - For more info click here This GrimmSpeed Catback Adapter gives you an easy way to install an aftermarket downpipe while maintaining your stock catback exhaust. This gives you the performance gains of an aftermarket downpipe, while maintaining a stock look and mostly stock sound. You can install a downpipe to the stock exhaust without this adapter, but you will spend a fair amount of time lining things up (trial and error) to avoid an exhaust leak. This adapter solves that problem.