Grail 3-inch exhaust system suitable for BMW M2 / M2 CS G87 (S58) – Valve system

The new M2 G87 – with GRAIL, finally a truly acoustically authentic experience M

The BMW M2 G87 is the uncompromising new generation of the cultM2 – with the S58-biturbo from the M3 / MThe G80/G82 is wider, more angular, and has significantly more power than its predecessor, the F87. However, BMW's use of the OPF (Otto Particulate Filter) and factory sound dampening to acoustically restrict the engine is immense. The GRAIL flap exhaust system eliminates this: full of S58-character, forceful and aggressive in MSport mode, subtle in cruise mode. The distinctive GRAIL delta between loud and quiet.

Completely made of L304 stainless steel, handcrafted in Germany. ECE type approval – therefore registration-free in all EU vehicles with standard approval. Ready to drive immediately after installation.

Flap control – factory-installed

The MThe G87 has its own exhaust valve control system as standard – the GRAIL takes over this completely. This means: no additional valve control is necessary, no wiring, no remote control. The valves are controlled via the factory-set driving modes of the G87. M2 addressed, just like BMW M it was designed as standard from the factory.

• In the M-Sport mode opens the flaps fully – full GRAIL sound
• In Comfort mode they remain closed – discreet and ECE-compliant

Plug-and-play connection to your OEM control unit M2 G87 or M2 CS – Operation as usual, sound like never before.

Configuration in the configurator

Before ordering, you select the following factors:

• Tailpipe diameter: 100 mm or 115 mm
• Tailpipe color: brushed stainless steel or black

Unsure about the configuration? Send us your VIN via WhatsApp or contact form – we'll check the model year and advise you before you order.

100 mm or 115 mm – which tailpipe diameter?

Both versions are technically identical in performance, but differ visually:

• 100 mm: Classic-M-typical, more subtle rear look – particularly suitable for the clean OEM appearance
• 115 mm: Significantly more present, noticeably thicker in the diffuser – ideal for anyone who wants a striking, aggressive appearance, especially in combination with the CS diffuser or M Performance Carbon

Tailpipe color

• Brushed stainless steel: Classic sporty, high-quality look at the rear
• Black: A subtle yet aggressive look – especially well-suited to a black package and dark rims.

Material & workmanship

LMade entirely of 304 stainless steel, with CNC-precision machined components. The silencers were specially designed in the GRAIL sound lab. S58-biturbo of the M2 G87 tuned. Flow-optimized pipe routing minimizes exhaust backpressure despite the integrated OPF. The solid stainless steel flaps switch precisely and are durable enough for everyday use.

Highlights

• Specifically designed for BMW M2 G87 and M2 CS G87 with S58-Biturbo
• ECE type approval – registration-free within the EU
• Flap control via standard BMW control unit – without additional module
• Tailpipes 100 mm or 115 mm in stainless steel or black
• 3 inch L304 stainless steel, handcrafted in Germany

Order with installation from FLOW DOWN®

FLOW DOWN® is an official GRAIL partner in the Ruhr area. When you order with installation, you'll receive our fair deposit payment model:

• 50% deposit upon order placement – we will then order the system from GRAIL
• As soon as the system arrives at our workshop, we will arrange an installation date with you.
• You only pay the remaining amount after the installation has been completed – not before.

Important: The deposit payment option applies exclusively to bookings including installation and is only available via prepayment/bank transfer. PayPal or other payment methods are not accepted for this service.

Swiss suitability assessment

Upon request, you can receive a Swiss suitability assessment for the GRAIL system for an additional fee. If interested, simply contact support.

Suitable vehicles

• BMW M2 G87 – from model year 2023 (S58-engine)
• BMW M2 G87 LCI
• BMW M2 CS G87 (S58-Motor)

Not suitable for: BMW M2 F87 (N55 engine, separate system), M2 Competition F87 (S55, own facility), M2 CS F87C (S55, own system). Separate GRAIL systems are available in the shop for each of these models.

scope of delivery

• GRAIL 3-inch flap exhaust system suitable for BMW M2 / M2 CS G87 (in your chosen variant)
• Tailpipes 100 mm or 115 mm in brushed stainless steel or black (depending on selection)
• mounting material
• ECE type approval as proof for the vehicle

Information on admission

Registration-free thanks to ECE type approval – applies to all EU vehicles with standard registration. For imported vehicles with a different operating permit, please check registration requirements before ordering. The ECE type approval certificate should be kept in the glove compartment.

All brands, model names and manufacturers mentioned in this shop such as AUDI, BMW, Hyundai, Kia, Toyota, VW, Tesla are used solely to describe the compatibility of our products . They have no connection with the respective brand owners and, unless expressly stated, they are not original parts from these manufacturers.

FLOW DOWN® is an independent supplier of tuning and accessories. The use of the brand names mentioned is for guidance only and does not constitute a collaboration, licensing or approval by the respective rights holders . All trademark and name rights are held by their respective owners.