Mishimoto MMDP-WRX-15CAT Subaru WRX 6SPD Catted Downpipe, 2015+, Silver Direct fit for the 2015+ WRX and 2014+ Forester XT Dyno-proven gains of up to 57 whp and 52 wtq with catted downpipeon tuned WRX Overall Size: 65" x 12" x 5.5" / Diameter: 3.5" at flange, 3" first bend to end of pipe Significant torque improvement in the low end and across the entire power band Mishimoto Lifetime Warranty