Long Tube Street Header Exhaust System, GT3 RS / 911 R (991.1)
Long-tube header system in 321 stainless with a metal-core 200 cpsi catalyst, aimed at keeping street legality while moving the collector.
Exhaust In production confidence: medium
Manufacturing
| Manufacturer | Dundon Motorsports |
|---|---|
| Origin | 🇺🇸 United States Vendor head office — place of manufacture not stated |
| Process | Fabricated / Welded |
| Additively manufactured | No |
| Material | Stainless Steel 321 |
| Notes | Dundon specifies 321 over 304 for its resistance to sensitisation at exhaust temperature — a real distinction, not a marketing one. |
Fitment
| 991.1 | GT3 RS, 911 R |
|---|
Road use. Retains a 200 cpsi catalyst. Confirm local emissions compliance before road use.
Sources
- 991.1 GT3RS and 911R Long Tube Street Header Exhaust System — Dundon Motorsports, accessed 2026-08-17