Camaro/Firebird 86-92 MAC Performance Single Cat Exhaust System with Stainless Tips, Shipping is not included. ALLOW 4-5 WEEKS FOR DELIVERY. This cat-back system comes with MAC's Flow Path Muffler that has a 3" inlet and two 2.5" outlets. The tailpipe ends on the cat-back have massive 3.5" slashback tips that include big 2.5" i.d. resonators. No clamps, slip joints or gaskets to leak with our True Fit series. Mandrel Bent Tubing for 30% more flow!! Fits to stock hangers. Comes with stainless tips.