Active Autowerke E9X M3 High Flow Mid-Pipe System

+12Hp and +8Ft/Lbs at the wheels with incredible drone-free V8 snarl!

This Track Pipe with X-Pipe and Connecting Pipes has really impressed the BimmerWorld crew! We replaced another aftermarket muffler-only exhaust (that had good sound) with the full AA system (including Active Autowerke rear section) and came away very happy. The AA rear section is nice with a very moderate tone, but when we installed the midpipe, the car came alive! The power is impressive and the sound is now AMAZING. With the full system installed, the M3 has a mellow idle and zero "drone" between idle and 4000rpm when on partial throttle. Under full throttle and from 4000rpm to redline the system emits a raw snarl to the tune of a Ferrari's racy note mixed with old-school V8 rumble! While cruising at 70-80mph in 6th gear, the exhaust emits a mellow hum that is hardly noticeable in the cabin - this car was very comfortable on a recent 1500 mile drive and much easier on the ears than the rear muffler-only section it replaced! And at the racetrack when running mostly full throttle, the exhaust note demands attention and drew a number of looks and questions.

Kit includes track pipe with x-pipe and connecting pipes designed and engineered to work with most after-market exhaust systems/mufflers on the market today without the need to cut, weld or modify. This system eliminates the secondary cats with the option to eliminate the primary cats for off road use. Active Autowerke is able to improve on the factory X Pipe design by a scavenging effect that yields high horsepower gains.

*There is also a Generation Two High-Flow Catalyst option available via V-Band clamp.

Key Features:

• Durable polished 100% 304 stainless steel

• Increase of 12 horsepower at the wheels

• Completely direct bolt-on with factory-style flanges

• No cutting required

• So easy, NO instruction manual needed

• Industry Active Autowerke standard warranty

• 15lb weight savings

NOTE: This product replaces the factory exhaust catalyst and is intended for use on TRACK / OFF ROAD RACING. It is not intended for use on public highways. If you intend on keeping your M3 100% street legal, we suggest the Generation Two High-Flow Catalyst option. Also, the corresponding Active Autowerke software is necessary when removing the catalyst to keep the CEL off. The Active Autowerke performance tune is also designed to take full advantage of the new free-flowing exhaust system. We also suggest the performance tune for the mid-pipe equipped with the high-flow catalysts for a corresponding performance increase.