Catted Downpipe With Midpipe And O2 Sensor
- Mfg Part #
- 40TDPCKT 40TDPCKT
- ECS Part #
- ES#4727517
- Brand
-
This product was last offered at the strikethrough price on
06-11-2026
Product Details
Audi designed the OEM mid-pipes with dual resonators to suppress the sound of your 4.0T. While that may be desirable for some drivers, as an enthusiast you want to hear more of the amazing sound generated by the twin-turbo V8 under the bonnet. The ARM 4.0T Midpipes do exactly that. If you install the upgraded midpipes while installing the downpipes, it only adds approximately 10 minutes to the installation, making it the perfect time to install the midpipes.
- Gain up to 37whp / 42wtq
- Faster Turbo Spool
- Improved Exhaust Note
- Fully Reversible
The OEM 4.0T downpipes incorporate two large coffee can-size catalysts which reduce exhaust flow and power from your 4.0T. By replacing your OEM 4.0T downpipes with the ARM 4.0T downpipes you will eliminate this restriction and free up exhaust flow.
Another drawback of the OEM downpipes is they are designed to cross over each other. The driver-side turbo connects to the passenger side midpipe, and vice versa on the opposite side. This forces the exhaust gasses to take a long pathway with several sharp kinks and turns. The ARM 4.0T downpipes begin and end on the same side to improve airflow and shorten the travel path of the exhaust gasses. This results in a faster turbo spool, more torque, and improved throttle response.
Starting at the turbos, the ARM 4.0T downpipes are made from one solid 4.4" x 3" collector for durability. This collector is welded to an OEM-style 5-Bolt flange that will fit any turbocharger upgrade for the 4.0T platform. The ARM 4.0T Downpipes include a stainless steel flex section to relieve stress from the turbos during aggressive acceleration, cornering, and braking.
he ARM 4.0T Downpipes utilize the OEM transmission mounting brackets to further secure them in place during aggressive driving.
While the ARM 4.0T Downpipes enhance the sound of your exhaust dramatically, if you are looking to take your exhaust note to the next level, the ARM 4.0T Midpipes are an easy upgrade to further open up the incredible sound of your 4.0T.
Audi designed the OEM mid-pipes with dual resonators to suppress the sound of your 4.0T. While that may be desirable for some drivers, as an enthusiast you want to hear more of the amazing sound generated by the twin-turbo V8 under the bonnet. The ARM 4.0T Midpipes do exactly that. If you install the upgraded midpipes while installing the downpipes, it only adds approximately 10 minutes to the installation, making it the perfect time to install the midpipes.
The ARM 4.0T Downpipes transition to a 2.25" 3-Bolt flange to match up perfectly with the OEM Midpipes or the ARM 4.0T Midpipes.
The ARM 4.0T Downpipes are built from SS304 stainless steel to ensure build strength and weld integrity for the life of your Audi 4.0T. You will never need another set of downpipes again!
Kit contains:
- 2x ARM 4.0T Downpipes
- 2x ARM Turbo Gaskets
- 2x ARM Midpipe Gaskets
- 10x Replacement Turbo Studs
- 10x Turbo Stud Nuts
- 6x Midpipe Bolts6x Midpipe Nuts
Not for sale or use in the state of California on any pollution-controlled vehicle as per the California Air Resources Board.
This Part Fits the Following Vehicles
| Make | Model | Submodel | Engine | Special Fitment Notes |
|---|---|---|---|---|
| Audi | C7 S6 | Quattro | 4.0T | Use vehicle selector to confirm fitment |
| Audi | C7 S7 | Quattro | 4.0T | Use vehicle selector to confirm fitment |
| Audi | D4 A8 | Quattro | 4.0T | Use vehicle selector to confirm fitment |
| Audi | D4 S8 | Quattro | 4.0T | Use vehicle selector to confirm fitment |
| Audi | RS7 | Quattro | 4.0T | Use vehicle selector to confirm fitment |
Kit Contents
| Description | Brand | Qty | Lifetime | |
|---|---|---|---|---|
| Catted Downpipe |
|
1 | YES | |
| Midpipe |
|
1 | YES | |
| O2 Harness Extensions |
|
1 | YES |
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Items marked as 'Free Shipping' may qualify for free standard economy ground shipping to the contiguous United States (48 states). Oversized products and direct ship products are excluded from this offer unless otherwise noted.
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Hurry, limited stock available!
Prop 65 Warning
Frequently Purchased Together
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-
Audi C7 S6/S7/RS7 4.0T X-Pipe Kit
In Stock- MFG Part#
- 006788la01aKT
- ECS Part#
- ES#4213786
- Brand
-
$382.49
