Fi Exhaust BMW M340i G20: price, sound and alternative

Fi Exhaust catalogue checked on 7 November 2026 on the brand's official website, official online shop prices in US dollars; sources at the end of the article.

The short answer. For a BMW M340i G20 or G21, the Rog system is a valved cat-back made from your VIN, in stainless steel or titanium, from €2,490, with free delivery and a 3-year warranty. On the Fi Exhaust official online shop, the valved cat-back for the M340i is listed from 3,000 US dollars, excluding shipping, and its product page is aimed at cars without a particulate filter.

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Valved Exhaust System for BMW M340i B58 G20 / G21 3.0T (2019+)From £2,118 · 20 working days See my exhaust

Contents 7

1. Fi Exhaust and the M340i: what the catalogue says.
2. The price of Fi Exhaust on the M340i.
3. The B58 sound: your choice.
4. Fi Exhaust or Rog on the M340i: the table.
5. Which one for your M340i.
6. Frequently asked questions.
7. Sources.

What Fi Exhaust offers for the M340i, what it costs, and what changes with a Rog system made from your BMW's VIN.

Fi Exhaust and the M340i: what the catalogue says.

On its official online shop, Fi Exhaust offers for the M340i G20 and G21 a valved cat-back in T304 stainless steel: front pipe, mid pipe and valved silencer, keeping the original valve control. The product page restricts it to cars without a particulate filter. A Fi Pro remote is sold as an option, a quad-tip version is available, and the downpipes, 200-cell or catless, are ordered separately.

The Rog system replaces everything after the downpipe, on the G20 saloon and the G21 Touring alike, and is made from your VIN, which confirms compatibility before manufacture.

The price of Fi Exhaust on the M340i.

On the official Fi Exhaust online shop, at prices checked on 7 November 2026, the valved cat-back for the M340i is listed from 3,000 US dollars, 3,800 dollars with the Fi Pro remote, and from 3,300 dollars in the quad-tip version. The 200-cell downpipe costs 1,250 dollars on top.

These are the official store's prices, in US dollars, excluding shipping. Under the brand's shipping terms, orders go out by international courier, and import duties and taxes, including VAT, are payable by the buyer on arrival. The Rog price, by contrast, includes free delivery and taxes.

At Rog, the price is shown on the product page: from €2,490 in stainless steel and €2,990 in titanium, valves and remote included, with free delivery.

The B58 sound: your choice.

The M340i gets the B58, a 3.0-litre turbocharged straight six: 374 hp and 500 Nm, and since November 2025, 392 hp and 540 Nm. Its round voice arrives muted as standard. The Rog system lets you choose:

• the character, at the same price: straight pipe for the raw sound of the straight six, or resonator for a rounder, slightly softer voice;
• the material: 304 stainless steel, or titanium about 40% lighter for the same design (+ €500), in a brushed, gold or purple finish;

The BMW M340i G20 system in titanium: brushed, gold or purple.

• the control, at the same price: your original valves, refitted on the system and still controlled by the drive modes, or Rog valves already fitted, with their remote;
• the front section, as an option: 200-cell or 100-cell catalysed downpipe (+ €820), or decat (+ €530).

The M340i downpipe, catalysed or decat.

Valves open, the straight six makes itself heard from start-up, climbs cleanly through the revs and crackles on lift-off. Valves closed, the M340i stays the everyday tourer, without drone. The system fits without welding, with clamps and gaskets, in about two hours at the garage of your choice.

Rog tips with the engraved R: black, burnt titanium or polished stainless steel.

Fi Exhaust or Rog on the M340i: the table.

Which one for your M340i.

If you want a complete system, controllable valves and the choice of character, material and front section, the Rog system is made for that: from €2,490, remote included, with free delivery and a 3-year warranty. It is made in 20 working days from your VIN, which confirms the model year before manufacture.

Configure everything on the BMW M340i G20 / G21 exhaust product page, see all our systems for this generation on the BMW 3 Series G20 / G21 exhaust page, and find every option explained in the M340i guide. Also worth reading: Fi Exhaust in France.

See also: Akrapovič BMW M340i · Fi Exhaust Supra.

Frequently asked questions.

How much is the Fi Exhaust system on the M340i?
On the official Fi Exhaust online shop (November 2026), the valved cat-back for the M340i is listed from 3,000 US dollars, with the 200-cell downpipe at 1,250 dollars on top. The Fi Exhaust price excludes shipping, and import duties and taxes are payable by the buyer according to the brand; the Rog price includes free delivery and taxes, from €2,490.

Does the Fi Exhaust cat-back suit an M340i with a particulate filter?
The Fi Exhaust product page consulted restricts it to cars without a particulate filter. The Rog system is made from your VIN, which confirms compatibility before manufacture.

Can my M340i Touring G21 take the Rog system?
Yes. The G20 saloon and the G21 Touring take the same Rog system. Your VIN confirms the model year before manufacture.

Can I keep the BMW valve control?
Yes, if your M340i has it: the system takes over its control. Otherwise, the Rog valves are operated with their remote, which is included.

Does the Rog system drone on the motorway?
No. With the valves closed, the gases flow through the whole rear silencer and the cabin stays calm at a steady speed.

Sources.

1. Fi Exhaust, official online shop: "BMW G20/G21 M340i | 3.0T B58 | 2019+ Valvetronic Catback Exhaust" product pages, "Quad Tips" version, 200-cell and catless downpipes, and shipping terms, prices in US dollars consulted on 7 November 2026.
2. Rog, BMW M340i G20 / G21 product page (price and options), read on 7 November 2026: BMW M340i G20 / G21 exhaust.