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Happy New Year!
Happy New Year!

340i 440i MIDPIPE UPGRADE

Original price $567.00
Original price $567.00 - Original price $567.00
Original price $567.00
Current price $547.00
$547.00 - $547.00
Current price $547.00
  • 30 Day Money-Back Guarantee | IN STOCK


HIGHLIGHTS

• Improved Exhaust Note
• Lighter Than OEM
• Maintains OEM Muffler
• SS304 Stainless Steel
• Smooth Mandrel Bent Tubing

   

PROFILE


The ARM 340i Midpipe significantly improves the sound of your B58, giving it the aggressive exhaust note you're looking for from a tuned B58-powered BMW. Designed to amplify the power and sound of your B58, the ARM 340i Midpipe eliminates the two central resonators found in the stock 340i midpipe.  By retaining the OEM muffler you still have the ability to control the volume of your exhaust.  Switch your car into Sport Plus and enjoy the sounds of the upgraded B58 sing, or flip it into comfort mode to drive through the neighborhood. 


 


CONSTRUCTION


The ARM 340i Midpipe will allow for perfect fitment, sitting well within the recess for the exhaust underneath the vehicle. It has also been engineered to sit at or above any other portions of the car, giving you adequate clearance, even if you're on a lowered suspension.

M240i Midpipe

The ARM 340i Midpipe is designed to fit either the OEM downpipe, or any upgraded downpipe that fits the OEM midpipe.  The ARM 340i Midpipe utilizes the OEM midpipe mounting location to secure the midpipe during aggressive driving.  

M240i Midpipe


The ARM 340i Midpipe is comprised of two sections, the longer front section and the shorter rear section.  The two sections of the ARM 340i Midpipe are joined with a slip-fit style connection and high quality performance-grade exhaust clamps.  The ARM 340i Midpipe upgrade deletes the two OEM resonators opening up the sound of your B58. 

M240i Midpipe

The ARM 340i Midpipe utilizes a full 3.25” system throughout, from the downpipe all the way to the muffler. 


IN THE BOX

• 1x ARM B58 Midpipe Front Section
• 1x ARM B58 Midpipe Rear Section
• 4x Exhaust Clamps


 

FITMENT GUIDE

Make Model Submodel Engine
BMW F30 340i B58 3.0L
BMW F30 340i xDrive
B58 3.0L
BMW F32 440i B58 3.0L
BMW F32 440i xDrive
B58 3.0L
BMW F34 340i Gran Turismo B58 3.0L
BMW F34 340i Gran Turismo xDrive B58 3.0L
BMW F36 440i Gran Coupe B58 3.0L
BMW F36 440i Gran Coupe xDrive
B58 3.0L
 

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)