Vehicle Fitment:
| Model |
Exhaust
Type |
Part Number |
| BMW E89 sDrive 23i |
Quad - 4 x 76mm round tips |
B5269.00764 |
|
BMW
E89 sDrive 23i |
Dual - 2 x
76mm round tips |
B5269.00762 |
|
BMW
E89 sDrive
30i |
Quad - 4 x 76mm round tips |
B5269.00764 |
|
BMW
E89 sDrive
30i |
Dual - 2 x
76mm round tips |
B5269.00762 |
|
BMW E89 Z4 35i |
Quad - 4 x 76mm round tips |
B5270.00764 |
|
BMW E89 Z4 35i |
Dual - 2 x
90mm round tips |
B5270.00903 |
Reduced Backpressure
Eisenmann Exhausts reduce engine heat and
backpressure and improve exhaust scavenging from the combustion chamber.
They also minimize the power robbing effects of the OEM system to
restore torque and horsepower to the engine.
Why is Backpressure
Bad?
Problem 1: Backpressure is a typical
feature of an exhaust system. The backpressure on the exhaust flow can
help to reduce sound, but at the same time, it limits engine power.
This power reduction comes from an inefficient burn in the
combustion chamber where spent exhaust gasses are backed-up into the
combustion chamber and contaminate the next burn cycle.
Problem 2: A second problem associated with backpressure
is heat build-up. This occurs in the OEM style chamber muffler.
Hot exhaust gasses are forced through louvers and into dead-end
chambers. The heat builds up in the muffler and then backs itself up
through the entire exhaust system to the exhaust manifold and engine.
This heat retention causes damage to the muffler as well as the
catalytic converter, the system tubing, the manifold and gaskets. Even
ignition wires can burn up due to an overheated, inefficient
exhaust system.
How do Eisenmann
Exhausts Solve the Problems of Backpressure?
Eisenmann reduces the backpressure while maintaining a
rich powerful performance tone. Annoying exhaust
frequencies are dampened with a dense wall of acoustical absorbing
material. The straight-through design prevents excessive heat retention
allowing the entire system to run cooler and last longer.
