Downpipe and the Mishimoto 2015+ Ford Mustang EcoBoost Cat-Back Exhaust? This 3.0in adapter eliminates the restrictive 2.25in center section that is the result of joining some aftermarket downpipes and cat-backs. The Mishimoto 2015+ Ford Mustang EcoBoost Exhaust Adapter is made a 304 Stainless Steel that will not rust in harsh climates and installs in under 30 minutes. This adapter perfectly complements the V-band flange on the Mishimoto downpipe and the 3in band clamp on the Mishimoto cat-back exhaust. And like all Mishimoto 2015+ Ford Mustang EcoBoost parts, this Adapter comes with the Mishimoto Lifetime Warranty.Looking for a smooth transition between the Mishimoto 2015+ Ford Mustang EcoBoost Downpipe and the Mishimoto 2015+ Ford Mustang EcoBoost Cat-Back Exhaust? This 3.0in adapter eliminates the restrictive 2.25in center section that is the result of joining some aftermarket downpipes and cat-backs. The Mishimoto 2015+ Ford Mustang EcoBoost Exhaust Adapter is made a 304 Stainless Steel that will not rust in harsh climates and installs in under 30 minutes. This adapter perfectly complements the V-band flange on the Mishimoto downpipe and the 3in band clamp on the Mishimoto cat-back exhaust. And like all Mishimoto 2015+ Ford Mustang EcoBoost parts, this Adapter comes with the Mishimoto Lifetime Warranty. 3-in Exhaust Adapter, fits Ford Mustang EcoBoost 2015-2017 2015 Ford Mustang EcoBoost 2.3 Liter 6R80, 2015 Ford Mustang EcoBoost 2.3 Liter MT82, 2015 Ford Mustang EcoBoost Premium 2.3 Liter 6R80, 2015 Ford Mustang EcoBoost Premium 2.3 Liter MT82