I just got done reading a little about Split-Inlet Exhaust Housing in Maximum Boost and it sounds like it helps a lot in our cars. I was just looking for other opinions on this matter since this is the first time I have heard about this, but I am new to Turbos and such.
Here is what it says in the book, [I]"A split-inlet housing permits the exhaust pulses to be grouped (or seperated) by cylinder all the way to the turbine. The merit of doing this is in keeping the individual package of energy, an exhaust putt, intact and unmolested by other putts all the way to the turbine. This can give the turbine a little better kick to get it moving. When you consider the absolute barrage of pulses and energy coming down the tube from an eight-cylinder engine, the turbine will get more energy than it needs for almost any given situation. Thus, a split-inlet housing will make zip for improvement on a single-turbo V-8. A four-cylinder, by comparison, which sees only one putt every 180 degrees of crank rotation, needs all the energy it can get from each pulse. Keeping them seperate and undisturbed will therefore pay some dividends."[/I]