S58 Z-Pipe Mid-Section
The off-the-shelf Z-pipe mid-section for the G8X S58 — a straight bolt-in replacement for the restrictive factory mid-section. Frees up flow and sharpens the S58's note. TIG-welded from T304 stainless in-house, test-fitted to a G8X, and ready to ship now.
Dyno-proven ECU tuning, done in-house — European specialists. Unlock the full gain from your build.
Sold standalone (unfitted). Built to suit the factory downpipes & rear muffler. Running aftermarket downpipes (catless or catted)? The flange orientation may need modifying to suit — enquire with your setup for an expert opinion and an accurate price.
Built for the S58
BMW's factory mid-section chokes the S58 to keep it quiet and emissions-legal. Our Z-pipe replaces it end-to-end — mandrel-bent T304 with braided flex joints, engineered to clear the driveshaft tunnel and bolt straight to the factory downpipes and rear muffler. Running aftermarket downpipes? The flange orientation may need modifying to suit — reach out for an expert opinion.
The result is freer flow and a sharper, more aggressive mid-range with the aggression the S58 deserves. Every join is TIG-welded on our own bench and test-fitted to a G8X before it ships — no drop-shipped guesswork.
What's in the box
- ✓ Z-pipe mid-section (T304 stainless)
- ✓ Braided flex joints
- ✓ OCTANE-stamped support bracket
- ✓ V-band clamps & gaskets
- ✓ Bolt-on hardware
| Fitment | M3 G80 · M4 G82/83 · M2 G87 |
| Engine | S58 · 3.0 twin-turbo |
| Material | T304 stainless steel |
| Piping | Twin 2.5″ (63.5 mm) mandrel-bent |
| Style | Resonator delete |
| Finish | Brushed stainless |
| Connection | Factory downpipes & rear muffler · aftermarket DPs may need flange mods |
| Made | In-house · TIG-welded |
| Warranty | Lifetime on welds |
