Scorpion Cat-Back Exhaust System
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Scorpion Cat-Back Exhaust System - BMW M135i (F20/F21) - 80mm
This Scorpion cat-back exhaust replaces the factory system from the catalyst back on the BMW M135i (F20 5-door and F21 3-door). It is made from T304 stainless steel with 80mm (3.15") pipework and finishes in 100mm tailpipes. This is a non-resonated system, so expect a noticeably louder and more aggressive sound than the factory exhaust. Scorpion lists it as fitting to the factory front pipework or Scorpion's own front sections.
Video
Scorpion exhaust road test – BMW M135i F20
Scorpion cat-back exhaust – BMW M135i
Options – Valve function: valved versions keep the factory electronic exhaust valves (using the OE valve motors), so the switchable sound modes still work; non-valved versions remove the valves and are louder all the time. Tailpipe finish: Daytona Polished Stainless – Scorpion's round Daytona tailpipes in a polished stainless finish; Daytona Black Ceramic – the same Daytona tailpipes with a black ceramic coating; Ascari Carbon Fibre – tailpipes with a carbon fibre outer sleeve.
Note: Suits the M135i 2012–2016. Scorpion also lists xDrive versions, which were not sold new in Australia. No Australian-delivered BMW has a GPF. Installation by a professional is recommended.
Features
- 80mm (3.15") T304 stainless steel pipework
- Daytona tailpipes, 100mm
- Fits the factory front pipework or Scorpion's own front sections
- Fully interchangeable with the factory system sections
- Weight approx. 18.37kg
Need help confirming fitment? Contact our team at sales@chicaneaustralia.com.au.
Vehicle Compatibility
| Make | Model | Chassis | Years | Engine / Notes |
|---|---|---|---|---|
| BMW | M135i 5-door | F20 | 2012 - 2016 | No GPF (Australian-delivered) |
| BMW | M135i 3-door | F21 | 2012 - 2016 | No GPF (Australian-delivered) |
Technical Specifications
| Spec | Value |
|---|---|
| Brand | Scorpion |
| Product type | Cat-Back |
| Pipe diameter | 80mm (3.15") |
| Tailpipe | Daytona |
| Tailpipe size | 100mm |
| Fits to | OEM / Scorpion |
| Material | T304 stainless steel |
| Weight | 18.37kg |
| Part number(s) | SBMS105 (Valved, Daytona Polished Stainless), SBMS105C (Valved, Daytona Black Ceramic), SBMS105CF (Valved, Ascari Carbon Fibre), SBMS106 (Non-Valved, Daytona Polished Stainless), SBMS106C (Non-Valved, Daytona Black Ceramic), SBMS106CF (Non-Valved, Ascari Carbon Fibre) |
Contents
Cat-back pipework sections
Rear silencer with tailpipes
Clamps and fitting hardware

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