Active Autowerke BMW Z4M Performance Software Tune Option:Regular Software (No Extra Charge) An available option replaces the

An available option replaces the restrictive secondary cats with high-flow 100 cell flat cats that changes the sound slightly providing a deeper sound

The X-Pipe design has a scavenging effect that yields modest horsepower gains

E93 M3 models

5u201d turbo back design

Active Autowerke BMW Z4M Performance Software Tune Option:Regular Software (No Extra Charge) An available option replaces theActive Autowerke BMW Z4M Performance Software Tune ***Before your order ships you MUST sign and return the Off Road Use Only Waiver available HERE. Please email, fax or take a photo of the completed form. You can email it to your sales rep or to info@activeautowerke. com and you can fax it to us at (305) 253 8921*** Active Autowerke's Engineers have spent countless amount of years fine tuning the BMW Z4M software tune to take full advantage of your