Use this muffler/ resonator with BORLA Cat-Backô systems 140590 and
140591 to create a quieter sound. It is NOT intended for use with other
systems. This is NOT a stand alone muffler/ resonator. 2.25" into 2.5"
diameter part. Built from premium T-304 stainless steel, superior to
T-400 series (such as 409) to give you the absolute best in performance
of all, BORLA stands behined every connection pipe with a Million-Mile
Warranty. Just what you'd expect from the world's most experienced (and
most winning) exhaust brand.