SPEEDFACTORY RACING STAINLESS MUFFLER 3" INLET WITH 4" TURNDOWN TIPSpeedFactory LT 5 Race Muffler 3. 0" Inlet You asked and we delivered with performance, sound, and aesthetics in mind we have created the ultimate muffler for you! The SpeedFactory LT 5 (Lobster Tail, 5pc pie cut) Race Muffler is a straight through design round body muffler which minimizes exhaust restriction and maximizes power output with a 4" pie cut turndown style exhaust tip. We have been making these in house for our local customers for years