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Happy New Year!
Happy New Year!

N20 Downpipe - F30 320i/328i

Original price $227.00
Original price $227.00 - Original price $227.00
Original price $227.00
Current price $217.00
$217.00 - $217.00
Current price $217.00
  • 30 Day Money-Back Guarantee | IN STOCK


HIGHLIGHTS

• Gain up to 17whp/25wtq
• Faster Turbo Spool
• Improved Exhaust Note
• Upgrade to Stage 2+ Tuning
• SS304 Stainless Steel
  

PROFILE

The ARM Motorsports N20 Downpipe is the best hardware upgrade to get the most power from your 320i or 328i.  The N20 has a stock downpipe with a catalyst that drastically restricts exhaust flow.  This limits not only the amount of power N20 can make on the stock tune, but also prevents upgrading to a stage 2 tune due to excessive back-pressure.  An N20 downpipe upgrade is the first hardware upgrade every N20 owner should invest in.  Upgrading your downpipe unlocks the most power, increases turbo spool, allows you to run stage 2+ tuning, and improves the exhaust note of your N20 powered BMW. 

CONSTRUCTION

The ARM N20 Catless Downpipe is built with mandrel bent SS304 stainless steel and backed by the ARM Motorsports Lifetime Warranty.  The ARM N20 Downpipe starts with a 4" diameter at the precision CNC machined turbo v-band connection and gradually reduces to a 2.5" diameter to optimize exhaust flow while matching up to the stock mid-pipe.  The ARM N20 Downpipe also features two mounting points to reduce tension on the turbo from shifting and twisting during aggressive driving.  

The ARM N20 Downpipe features two O2 sensor bungs to allow for reinstallation of the OEM oxygen sensors.  An tune or CEL Delete will be required to avoid a check engine light from displaying on instrument panel.

 By reducing the back-pressure on your turbocharger, the ARM N20 Downpipe prepares your 320i / 328i for higher boost tunes. Testing on our 328i with only a Stage 1 tune yielded a very respectable 17whp and 25wtq gain.  While switching to a Stage 2 tune gave it an additional 13whp and 12wtq, a total gain of 30whp and 38wtq over Stage 1 alone.

In addition to helping your N20 make more power and torque, it also opens up the otherwise tame exhaust note.  If you're running a stock midpipe and catback section you'll notice a substantial increase in volume under full throttle and a moderate increase in sound during part throttle.  Coupled with a midpipe or full exhaust your N20 can sound quite impressive.  The ARM N20 Downpipe connects to any aftermarket exhaust that is compatible with the stock N20 downpipe.

All ARM Motorsports Products are backed by a 30 Day Guarantee and ARM Limited Lifetime Warranty.  

IN THE BOX

• ARM N20 Downpipe

 

FITMENT GUIDE

Make Chassis
Model Engine
BMW F22 228i N20 2.0L
BMW F22 228i xDrive N20 2.0L
BMW F23 228i N20 2.0L
BMW F23 228i xDrive N20 2.0L
BMW F30 320i N20 2.0L
BMW F30 320i xDrive N20 2.0L
BMW F30 328i N20 2.0L
BMW F30 328i xDrive N20 2.0L
BMW F31 328i xDrive N20 2.0L
BMW F32 428i N20 2.0L
BMW F32 428i xDrive N20 2.0L
BMW F33 428i N20 2.0L
BMW F33 428i xDrive N20 2.0L
BMW F34 328i xDrive N20 2.0L
BMW F36 428i N20 2.0L
BMW F36 428i xDrive N20 2.0L
BMW F10 528i N20 2.0L
BMW F10 528i xDrive N20 2.0L
 

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.

This product is for Off-Road Use Only. Items sold for off-road use only are illegal to use on public roads in most states and provinces. This product is intended for racing vehicles which may never be used on a public road.
*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)