Cat-Back Exhaust SystemSuper Turbo System1987-95 Wrangler 2.5L/4.0LSingle tailpipe2.5" Stainless Tip Dynomax's Super Turbo system is a Single 2.25" system with a 2.5" Polished Stainless Steel Tip and a Super Turbo™ Muffler. You must use a factory intermediate pipe to complete installation (not included).