The ARM Motorsports Audi 4.0T Downpipes are a pair of stainless steel downpipes for the twin-turbo 4.0T V8 in the Audi S6, S7, RS7, A8 and S8. ARM says they remove the restriction of the two large factory catalysts and, because they begin and end on the same side instead of crossing over like the OEM units, they shorten the exhaust path for faster turbo spool, more torque and better throttle response. They are built from SS304 stainless steel with a solid 4.4" x 3" collector welded to an OEM-style 5-bolt flange, a stainless flex section and a 2.25" 3-bolt outlet flange that matches the OEM or ARM midpipes. ARM quotes gains of up to 37whp and 42wtq.
Features
- Up to 37whp and 42wtq, per ARM
- Begin and end on the same side, unlike the crossover OEM units
- Eliminates the two large factory catalysts
- SS304 stainless steel construction
- Solid 4.4" x 3" collector with OEM-style 5-bolt turbo flange
- Stainless flex section relieves stress on the turbos
- Uses the OEM transmission mounting brackets
Specifications
- Brand: ARM Motorsports
- Product Type: Downpipes
- Material: SS304 stainless steel
- Collector: Solid 4.4" x 3"
- Turbo Flange: OEM-style 5-bolt, fits any turbo upgrade for the 4.0T platform
- Outlet Flange: 2.25" 3-bolt, matches OEM or ARM 4.0T midpipes
- Flex Section: Stainless steel
- Included: 2 downpipes, 2 turbo gaskets, 2 midpipe gaskets, 10 replacement turbo studs, 10 turbo stud nuts, 6 midpipe bolts, 6 midpipe nuts
- Warranty: Lifetime warranty against defects in craftsmanship or fitment (per ARM Motorsports)
- Part Number: 40TDP
Vehicle Compatibility: 5 applications across 1 make. Select a make to view.
Audi (5)
| Model | Variant | Engine | Years |
|---|---|---|---|
| S6 | C7/C7.5 | 4.0T | |
| S7 | C7/C7.5 | 4.0T | |
| RS7 | C7/C7.5 | 4.0T | |
| A8 | D4 | 4.0T | |
| S8 | D4 | 4.0T |
Please confirm fitment against your vehicle before ordering. Contact us if you need help selecting the right part.