Kawasaki Concours 14 GTR1400 13" Stainless Tri-Oval Muffler Exhaust 08-15 16 17 18 Concours 1400 (2008-2018) Delkevic 13" Tri-Oval muffler is manufactured with high grade 304 stainless steel and polished to a mirror finish. This set includes all necessary hardware to mount the muffler onto a stock header. If gaskets are required for installation, they are provided. No rejetting or remapping is required after fitment on a stock bike however we always recommend a dyno test. If the motorcycle has other modificaitons to the intake or exhaust system some tuning may be required. Delkevic mufflers are handcrafted from the finest quality materials to enhance your motorcycle in both performance and looks.