What Imran thinks:
"Pair this up with a stock exhaust and you free up a significant amount of power for a NA car and it sounds great without any drone. If you want to go a bit louder, pair it up to any aftermarket exhaust that fits the stock X Pipe. This product has been a firm favourite with our customers since we launched it in 2012."
* Order lead time when out of stock: 8-10 weeks
The primary catalysts on the E9X M3 are the single most restrictive part of the factory set up. Removing these allows the engine to breathe more efficiently and provides more power and torque throughout the rev range.
Our customers demanded a solution that would fit the stock rear section (or any aftermarket exhaust that fits the stock X pipe) and that did not increase the volume too much.
We therefore developed an X Pipe which would fit the standard rear section and produce a sophisticated noise with high quality secondary catalytic converters and resonators to temper the volume.
Power gains alone from this section are in the region of 25-30hp and 25lb/ft torque.