- XFORCE - 2.5″ Single Side In, Dual 2.25″ Side Out, 5″ X 18″ X 24" Oval Muffler. EAST/WEST Muffler design 2.5″ inlet Dual 2.25″ outlets 304 Stainless steel Brushed finish Experience enhanced exhaust flow and optimal efficiency with our XFORCE - 2.5″ Single Side In, Dual 2.25″ Side Out, 5″ X 18″ X 24" Oval Muffler. Designed for maximum performance and precision, this muffler boasts a unique EAST/WEST design with a 2.5" inlet and dual 2.25" outlets. Crafted from premium quality 304 stainless steel and finished with a sleek brushed look, this muffler is built to last. Upgrade your driving experience and increase the power of your vehicle with XFORCE.