Best valved exhaust for BMW X1 M35i U11

Your vehicle.

All our exhausts for this generation, version by version, are brought together on one page: BMW X1 U11 Valved Exhaust.

The X1 M35i is the most powerful X1 of the U11 generation: a compact family SUV, developed by BMW M, with a 300 hp four-cylinder and all-wheel drive. Before choosing its line, here is what sets it apart from the other X1s and what the Rog product page makes possible.

Body style

U11 compact SUV, third generation of the X1

Years

Presented in June 2023, delivered in Europe since November 2023

Engine

B48: 1,998 cm³ turbo four-cylinder

Factory output

300 hp (221 kW) in Europe, from 5,750 to 6,500 rpm; 400 Nm from 2,000 to 4,500 rpm

Drivetrain

Seven-speed dual-clutch Steptronic, xDrive

Tailpipes

Four of 80 mm, in two pairs of twin tips

Front section

Factory: the product page does not replace it

The most powerful X1

The third-generation X1, code U11, received its M35i xDrive version in June 2023. BMW presents it as the flagship of the X1 range, with the most powerful four-cylinder of its engine generation, a chassis tuned by BMW M and xDrive all-wheel drive.

First deliveries began in October 2023 in the United States, then in November 2023 in Europe. The X1 M35i is built in Regensburg, like the other versions of the X1 of this generation.

The Rog product page targets this M35i since its launch in 2023. The previous-generation F48 X1 has another product page, and the VIN, given when you order, confirms your SUV's version before building.

A 300 hp four-cylinder

The engine of the X1 M35i, designated B48 on our product page, displaces 1,998 cm³, with a bore of 94.6 mm for a stroke of 82 mm and a compression ratio of 9.5 to 1. It runs on the Miller cycle, and BMW carried over for it the crankshaft bearing shells and bearing caps of its most recent six-cylinders.

In Europe it delivers 300 hp, or 221 kW, between 5,750 and 6,500 rpm, and 400 Nm from 2,000 to 4,500 rpm. In the United States and some other markets, BMW quotes 317 hp, or 233 kW. The X1 M35i goes from 0 to 100 km/h in 5.4 seconds, and its top speed is limited to 250 km/h.

The product page publishes no tuning value for this model: the Rog line is a cat-back only, which leaves the engine and its ECU as BMW M tuned them.

Dual clutch, xDrive and M Sport Boost

The dual-clutch Steptronic gearbox has seven speeds and can also be operated with the steering-wheel paddles. The front axle gets a mechanical limited-slip differential, built into the gearbox, and xDrive sends torque to the rear within milliseconds when grip demands it.

An M Sport Boost function puts engine, gearbox and chassis in their sportiest setting: just pull the left paddle for at least one second. It is in this setting, with the flaps open, that the Rog line makes the most sense.

A family SUV with restrained weight

At 1,665 kg unladen, the X1 M35i keeps its weight in check for a four-wheel-drive SUV with 300 hp. Its power comes from a compact, transversely mounted engine that leaves the cabin and boot the space of an ordinary X1.

BMW M adds its chassis tuning, the dual-clutch gearbox and xDrive, without taking away what makes an X1: five seats and a high driving position. It is this double face, family and sporty, that the Rog line extends: it gives the engine a voice without changing anything about how the car is used.

Four tips, a first

The X1 M35i introduced a detail: BMW presents it as the first BMW M GmbH performance model whose exhaust gases leave through two pairs of twin tips. Each of the four measures 80 mm in diameter, and they are built into the rear bumper specific to this version.

The Rog line keeps these four tips. To dress them, the product page offers Rog tips, in blued titanium, gloss black or chrome, or optional carbon tips with the M logo, in three finishes: forged, black, or carbon combined with titanium. You can also order the line without tips.

The voice of a well-bred four-cylinder

A turbo four-cylinder does not have the grain of an inline-six. The M35i's engine nevertheless has a dry, rasping voice, more frank than its layout would lead you to expect, which hardens noticeably in the last thousand revs.

BMW promises a soundtrack rich in emotion thanks to the M-specific exhaust. In practice, the factory line remains that of a family SUV, which has to pass through city centres and car parks without drawing attention: outside, the engine's grain arrives polished and distant.

With the Rog line, flaps open, the four-cylinder's roughness comes out from the first pull-away and at every upshift; with the flaps closed, the X1 regains the calm expected of an SUV that does the school run in the morning and holidays in summer.

The character has no effect on the price: the straight pipe delivers the engine unfiltered, the resonator gives it a rounder, slightly softer voice, handy for an SUV that shares the road with the whole family.

Flaps fitted by Rog

On the X1 M35i, we deliver the line with the Rog system: flaps fitted in advance, a two-button remote and a small box hidden in the boot. The flaps obey only you: open, they stay open even in the calmest mode; closed, they stay closed even during an M Sport Boost.

So on every outing you choose between the voice of the M35i and the silence of a family SUV, without depending on a setting of the car.

Why flaps on an X1

On an SUV that does everything, a permanent sport exhaust would quickly become tiring: early starts, underground car parks, the holiday motorway. The flaps settle that. Closed, they force the gases through the mufflers and the volume stays close to factory; open, they release a direct path, and the four-cylinder finally expresses itself outside. A single vehicle, two uses.

A rear line, and nothing else

The X1 M35i product page sells a cat-back only: no front section option, no remap, no promise of horsepower. The factory catalytic converter stays in place, and the engine keeps exactly its 300 hp.

That leaves the material. 304 stainless steel, which withstands the salt of winter roads, is the sensible choice for an X1 used in all seasons; titanium, about 40% lighter for the same design, lightens the rear and comes in three finishes at no extra cost. The line is made from your X1's VIN; your garage then assembles it with clamps and gaskets, without welding.

Configure your exhaust.

How the exhaust is put together

On the X1 M35i, the Rog cat-back takes over behind the factory front section, catalytic converter included, and extends to the four 80 mm tips; mufflers and flaps are part of it. This SUV's product page offers no front section: the rest of the exhaust and the engine remain BMW's.

Each choice explained in detail, from sound to material: How to configure your exhaust.

Three recommended configurations.

• Family SUV

  • Stainless steel
  • Resonator
  • Rog chrome tips
  • Rog remote

  For an X1 M35i that takes the children to school every morning: a rounder voice with the flaps open, the silence of an SUV with them closed, and a stainless line that does not fear winter.

  View this configuration

• Compact sports car

  • Stainless steel
  • Straight pipe
  • Carbon tips with the M logo

  For an X1 M35i driven as a sports car at the weekend: the rasping grain of the four-cylinder unfiltered, and carbon tips that assert the BMW M character.

  View this configuration

• The lightest

  • Brushed titanium
  • Straight pipe
  • Rog blued titanium tips

  For an X1 M35i whose rear you want to lighten: titanium weighs about 40% less than stainless steel for the same design, and its brushed highlights match the blued titanium tips.

  View this configuration

From order to fitting.

VIN, manufacture, delivery, fitting and warranty, step by step

Questions.

Further reading.

• All our BMW X1 U11 lines
• BMW X1 F48 B48 guide
• BMW 230i G42 B48 guide
• BMW M135i F40 guide