Quote:
Originally Posted by LACSTER
Hamann has a real nice one for sale in the vendor section.
Hamann Quad Exhaust For 523i &528i Gas & Diesel Engines (requires Hamann diffuser)
You can cut your OEM bumper to fit this or by the Hamann diffuser
Contact GMP Matthew in the vendor section or any other Hamann dealer. |
Besides aesthetics, are there any benefits of having this? Little HP bump? Does it affect gas mileage?
Thanks!