#108866, "RE: small large small intercooler pipe?" In response to In response to 0
Really not sure what you are asking, but there are reasons for different size piping.
For example, with Hahns setup the hot pipe is 2.25" while the cold pipe is 2.5" This was designed this way to help compress the outgoing air charge into the intercooler as you lose some pressure in the IC core.
1999 Eclipse GS Built motor Hahn 16G Turbo w/ FMIC Hahn Stage 5 Portfueler (270's & 500's) Zeitronix Zt-2 wideband w/ 3.5bar MAP 3" SS Turbo Back CM Stage 4 Clutch and Fidanza Flywheel Baer Big Brake Kit