This is a 4″ downpipe to fit the N55 engine which was fitted to the high performance versions of the BMW 1 Series, 2 Series, 3 Series and 4 Series.
The N55 engine was phased in from around the middle of 2013; if you are unsure on fitment just ask.
In addition to an improving and deepening the exhaust note, this downpipe adds power and minimises turbo lag, making the awesome N55 engine even more responsive.
Catless Downpipes Features:
- Typical gains will be around 20 – 40bhp depending on other mods
- Laser cut Stainless cat-back flanges, and CNC’d Stainless V-Band flanges
- 100% TIG welded
- Large 4″ bore, for maximum flow
Fits: E9x & E8x (135i & 335i, N54 turbo) [Fits both LHD and RHD vehicles] Because this will remove a catalytic converter it is not road legal in the UK.
It is also likely to bring on an engine management light, there are 2 solutions to remove this, 1/ have the car remapped 2/ fit engine light cheater to the lambda sensors.
Option 1 is the prefered method as it will also allow the engine to fully take advantage of the improved flow and maximise the power. If you choose option 2 then ask for the link to the cheaters.