new exhaust, back presser, lower temp.

[BL Ent]

Does back presser runs the turbo, and also makes egr system work? Most problems with 6.0L I read is soot from exhaust cycles back through motor and mixes with clean air? This is to cool the exhaust air down, but also pushes the crap back in the motor.
Question is does new exhaust system like ( banks or others ) with less back presser kept the exhaust from being pushed back through the egr at a lower percent. Please enlighten me.
BL

[1uncoolF350]

BL,

An exhaust system lowers the backpressure after the turbo not before it.
The turbo by design creates all the back pressure that the engine needs to work with all of the sensors.

A turbo back exhaust will reduce pressure after the turbo allowing faster spool up, cooler EGT's and sound changes, the first two beacuse the turbo is not having to work as hard to push the exhaust thru the facotry muffler.

Marc