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Happy New Year!
Happy New Year!

Audi B9 3.0T S4 S5 Catted Downpipe

Original price $779.00
Original price $779.00 - Original price $779.00
Original price $779.00
Current price $697.00
$697.00 - $697.00
Current price $697.00


  • 30 Day Money-Back Guarantee | IN STOCK

HIGHLIGHTS


• Increased Power and Torque
• Massive 6.5" Design
• Faster Turbo Spool 

• Improved Exhaust Note
• Fits ARM and OEM Midpipes
• Supports Hybrid Turbo Setups


AUDI B9 S4 S5 DOWNPIPE

PROFILE

The ARM B9 S4 Catted Downpipe gives your Audi 3.0T EA839 engine all the power with less emissions! It allows for more exhaust flow from the turbocharger while keeping exhaust fumes lower. This allows your 3.0T to spool faster, increasing power, and improving throttle response, especially in the lower RPM range. On top of all of these performance benefits, the ARM B9 3.0T Downpipe upgrade opens up the sound of your 3.0T especially when paired with the ARM B9 Midpipes, giving you the sound to match! 

Check out the video below to hear the sound difference the ARM Downpipe and ARM Midpipes makes versus the OEM downpipe and midpipes. 


The OEM 3.0T downpipe utilizes a large 800 cell catalyst that restricts vital airflow out of the engine. The ARM B9 3.0T Downpipe replaces this restrictive section of the exhaust with a 200 cell catalyst, allowing you to free up more power from your 3.0T!

AUDI B9 S4 S5 DOWNPIPE
A tune is not required to run the ARM B9 3.0T Downpipe, but pairing it with a tune will greatly increase the output of your 3.0T. 

CONSTRUCTION

 The ARM B9 3.0T Downpipe upgrade starts at the turbocharger where we have a precision CNC machined turbo flange to match the OEM turbo, or any turbo upgrade that fits the OEM downpipe. 

audi b9 s4 s5 downpipe

From there the ARM B9 S4 Downpipe has a massive 6.5" catted section to maximize exhaust flow straight off the turbo, which then transitions to a 3.5" Y-section.  The midpipe flanges on the ARM B9 3.0T Downpipe are precision cut and designed to mate up to either the OEM B9 midpipes, or the ARM B9 Midpipes.  Pairing the ARM B9 3.0T Downpipe with the ARM B9 Midpipes creates an exotic and intoxicating exhaust note that will leave you grinning ear to ear.




The ARM B9 3.0T Downpipe comes with gaskets and hardware for the midpipe connection.

IN THE BOX

• ARM 3.0T B9 Catted Downpipe
• Midpipe Gaskets and Hardware

FITMENT GUIDE


Make Chassis Model Engine
AUDI
B9
S4
3.0T
AUDI B9.5 S4 3.0T
AUDI
B9 S5 Coupe 3.0T
AUDI B9 S5 Sportback 3.0T
AUDI B9.5 S5 Coupe 3.0T
AUDI B9.5 S5 Sportback 3.0T
 

ARM MOTORSPORTS LIFETIME WARRANTY

Every ARM Motorsports product is backed by a lifetime warranty which is automatically issued at the time of purchase. Your warranty protects you against any defects in craftsmanship or fitment. The warranty entitles you to a replacement unit.
*Kits are made-to-order. As we do not physically keep everything in stock, kits have a ship time of about 3 weeks after your payment has processed. This is common for the N54 Single Turbo market if you look on other websites.

Unleash the full potential of your N54 engine with our Top Mount Single Turbo Kit, engineered for seamless fitment, durability, and big power capability. Designed to support 800whp+, this kit is the ultimate upgrade for those who demand power without compromise.

High-Quality 304 Stainless Steel Manifold

Crafted from 304 stainless steel, the manifold offers superior heat resistance, corrosion protection, and structural integrity. Unlike lower-grade materials, 304 stainless ensures long-term reliability under extreme heat and boost pressures, making it ideal for high-performance applications. The precision-engineered tubular design is optimized for maximum exhaust flow, reducing backpressure and enhancing turbo efficiency. This manifold is similar to ones being sold on AliExpress and other overseas markets. However, we've partnered directly with the manufacturer to provide these manifolds in the highest of quality. Unlike those that are drop-shipping similar manifolds from unreliable sources. You are purchasing directly from the source.

Industry-Leading Fitment

Fitment has been meticulously tested and compared against all major top-mount kits on the market, and ours ranks among the best. The compact yet efficient design ensures hassle-free installation, eliminating clearance issues that plague other kits.

Smart Wastegate Placement

No more tearing the entire kit apart just to make a simple wastegate adjustment. Our strategically placed wastegate design allows for quick, easy access, so you can fine-tune your setup without unnecessary downtime.

Built for Serious Power

With the ability to support 800whp+, this kit is designed for enthusiasts pushing their N54 to the limit. Whether you’re chasing high-speed pulls or dominating the track, this setup provides the boost response, reliability, and power potential you need.

So what's included? 

(x1) Top Mount T4 Manifold
(x1) Relocated Coolant Waterpipe 
(x2) Coolant Port Block Off Plugs
(1x) -4 Oil Feed Adapter
(1x) Rear Oil Drain Freeze Plug
(1x) 5/8" ID Oil Drain Hose
(1x) 5/8" Oil Drain Barb 
(x1) -4 Stainless Steel Oil Feed Hose + Adapter
(x16) OEM Exhaust Manifold Studs
(x16) OEM Reduced Length Exhaust Manifold Nuts
(x6) Elring Exhaust Manifold Gaskets
(1x) T4 Turbo Blanket
(x3) O-Rings
(1x) Turbo-To-Intercooler Piping
(x1) Turbo (Optional)
(x1) 3" V-Band Hood Exit (Optional)
(x1) 44mm Wastegate (Optional)