This is a 4″ downpipe to fit the N55 engine which was fitted to the high performance versions of the 1 Series, 2 Series, 3 Series and 4 Series.

Option 1 is the preferred method as it will also allow the engine to fully take advantage of the improved flow and maximise the power.

Key features

• Vehicle-specific fitment: BMW 1-Series (E81/2/7/8) — 07-13
• Straight-through replacement section
• 3″ pipework · Stainless Steel construction · TIG-welded joints
• Fitting kit included

Sound and character

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.

Design features

CNC-machined V-band flanges provide secure connections at the turbo outlets.

Fitment notes

Fits 07–13 BMW 1-Series (E81/2/7/8) models using engine code N54.

Important: The N55 engine was fased in from around the middle of 2013, if you are unsure on fitment just ask.

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: F2x & F3x (135i, 235i, 335i & 435i N55 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. If you choose option 2 then ask for the link to the cheaters.

What’s in the box?

• 1 × Downpipe Assembly