Race Header System with Valved Side Deletes, GT3 / GT3 RS / R / Touring (991)
Full race header package quoted at 36 lb against 86 lb of factory hardware — a 50 lb swing, the largest single weight change in this catalog.
Exhaust In production confidence: medium
Manufacturing
| Manufacturer | Dundon Motorsports |
|---|---|
| Origin | 🇺🇸 United States Manufactured here Dundon Motorsports fabricates in the USA. |
| Process | Fabricated / Welded |
| Additively manufactured | No |
| Material | Stainless Steel 321 |
Published figures
| Weight | 16.3 kg |
|---|---|
| OEM weight | 39 kg |
| Weight saving | 58% |
| Basis | Published by the manufacturer; not independently verified. |
| Notes | Published as 36 lb versus 86 lb stock; converted here. Includes the stock GT3 muffler flaps in the compared assembly. |
Fitment
| 991.1 | GT3, GT3 RS, 911 R |
|---|---|
| 991.2 | GT3, GT3 RS, GT3 Touring |
Road use. Race headers with side deletes. Not emissions compliant.
Sources
- Dundon Motorsports 991.1/991.2 GT3 Race Header System w/ Valved Side Deletes — Zweck, accessed 2026-08-17