ETS Black Rear Upper Intercooler Pipe for 2008+ Mitsubishi Lancer Evolution Evo X 10 The ETS Mitsubishi Evolution X Upper Pipe removes the restrictive factory pipe which necks down to 1.75" before the turbo outlet and replaces it with a full 2.5" upper intercooler pipe which helps with throttle response as well as reliability. 2.50" Mandrel Bent Piping Upper Intercooler Pipe Bracket 4-ply Silicone. T-Bolt Clamps. Includes all mounting hardware.