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Eisenmann Cat-Back Exhaust for 2008+ BMW Z4 23i/30i/35i [E89] Dual Exit or Quad Tips


Quick Overview

Allow your E89 Z4's twin turbo engine to breath deeper and release all the stored HP and TQ with this flawless Eisenmann exhaust system!!!

Sku # : Eisenmann_Exhaust_Z4_E89_ER3
Exhaust Type
Eisenmann has just introduced a new state of the art exhaust system for the new E89 Z4 35i.  This bullet proof exhaust systems feature full bolt on construction, and the hand built craftsmanship that Eisenmann customers can expect from none other than Eisenmann.  The E89 Z4 35i exhaust is truly an impressive piece. This exhaust system bolts to the factory downpipes, and can be combined with an aftermarket high flow down pipe for a true turbo back exhaust. Two tip styles are available- 2x90mm, and 4x76mm quad tips, along with a Sport and Race sound level.  This system gives you the sound of a mean V-8 without any of the interior resonance.  Eisenmann designed this system to fit flawlessly and to allowed this 3.0L twin turbo motor to truly come alive.  Replace your stock restrictive system with this NEW custom crafted performance exhaust system.
  • Hand Build Craftsmanship
  • Mean, aggressive exhaust tone
  • Impressive HP and TQ gains
  • Comes in 2 different tip styles
  • Available in sport or race sounds
  • Full bolt on construction
  • Precision build for a perfect leak free fit
  • Weight reduction from stock muffler
  • Incredible racing look

Performance Levels:

  • SportGreat for the everyday driver provides performance gains, with a nice deep exhaust tone.
  • Race A more serious option, provides higher performance, more weight savings, and a louder exhaust tone.

Quad Tip Race System

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.

Eisenmann Z4 35i E89 4x76mm B5270.00764


Eisenmann Z4 35i E89 2x90mm B5270.00903

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