The TOWMA High-Performance Downpipe for the BMW F8X takes the performance of your M2 Competition, M3 F80, or M4 F82/F83 to the next level. This upgrade delivers maximum flow, an aggressive sound, and provides the perfect foundation for Stage 2 tuning. Available as a catless or high-flow sports catalytic converter.
Advantages
- Maximum flow — free diameter for minimum restriction
- More power — 25-35 extra hp with Stage 2 tuning
- Faster turbo response — less backpressure, faster spooling
- Aggressive sound — deep, powerful M-series tone
- OEM+ fit — direct mounting without modifications
- T304 stainless steel — high-quality stainless steel
- TIG welded — perfect welds for optimum strength
- Optional heat shield — extra thermal protection
Material & Construction
The TOWMA downpipe is manufactured from high-quality T304 stainless steel and fully TIG-welded for optimum strength and flow.
Available in two variants:
1. Catless (without catalytic converter):
- Maximum flow and performance
- Loudest, most aggressive sound
- Maximum power gain (30-35 hp with Stage 2)
- Not MOT-proof in the Netherlands
- For track/export use only
2. High-Flow Sports Catalyst (200-cell):
- Balance between performance and emissions
- Sporty sound, slightly less loud than catless
- Good power gains (25-30 hp with Stage 2)
- Possibly MOT-proof (depending on inspection)
- Suitable for daily use
Optional heat shield: For extra thermal protection.
Performance & Sound
Capital gain:
- Catless: +30-35 hp with Stage 2 ECU tuning
- High-flow cat: +25-30 hp with Stage 2 ECU tuning
- Without tuning: +10-15 hp (only due to better flow)
- Total power with Stage 2: 500+ hp possible!
Sound character:
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Idle: Deeper, more present bass
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Acceleration: Aggressive turbo whoosh and wastegate flutter
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High revs: Loud, race-inspired sound
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Deceleration: Pops and bangs (with tune)
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Downshifts: Aggressive backfire and crackling
Installation & Assembly
The downpipe is designed for plug-and-play installation on the original BMW mounting points.
Installation time: 2-3 hours for an experienced BMW specialist
ECU Tuning: For optimal performance, Stage 2 ECU tuning is STRONGLY recommended.
Compatibility
Suitable for:
- BMW M2 Competition F87 (2018-2020) — S55 engine
- BMW M3 F80 (2014-2018) — S55 engine
- BMW M4 F82 Coupé (2014-2020) — S55 engine
- BMW M4 F83 Convertible (2014-2020) — S55 engine
Technical Specifications
| Characteristic |
Specification |
| Brand |
TOWMA Carbon & Performance Parts |
| Product |
High-Performance Downpipe |
| Material |
T304 Stainless Steel |
| Variants |
Catless or High-Flow Cat (200-cell) |
| Heat shield |
Optionally available |
| Suitable for |
F8X M2/M3/M4 S55 |
| Capital gains |
25-35 hp (with Stage 2 tune) |
| Warranty |
3 years on construction and fit |
| Price |
€899 |
Frequently Asked Questions
-
Do I need ECU tuning? Not required, but highly recommended. Without tuning, you'll gain 10-15 hp, and with Stage 2 tuning, you'll gain 25-35 hp.
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Is this MOT-proof? Catless is NOT. High-flow cat is possible, depending on inspection.
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Will this fit my M2 Competition? Yes, the M2 Competition has an S55 engine, just like the M3/M4.
