SKU: 39980167461

Front Mount Intercooler For BMW F25 X3 & F26 X4 28i, 35i

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Description

Front Mount Intercooler For BMW F25 X3 & F26 X4 28i, 35iThe ARM Motorsports F25 F26 X3 X4 FMIC is a Direct Fit Front Mount Intercooler solution for your BMW X3 X4 xDrive 28i and xDrive 35i! One of the F25 F26 X3 X4's most significant weak points is its stock intercooler. This becomes obvious when tuning the N20 N55 to increase boost with a Stage 1 tune and even more so with a Stage 2+ tune. With a higher boost target the charged air coming out of the compressor is hotter, therefore increasing IAT's. To

The ARM Motorsports F25/F26 X3/X4 FMIC is a Direct-Fit Front Mount Intercooler solution for your BMW X3/X4 xDrive 28i and xDrive 35i!  One of the F25/F26 X3/X4's most significant weak-points is its stock intercooler.  This becomes obvious when tuning the N20/N55 to increase boost with a Stage 1 tune and even more so with a Stage 2+ tune.  With a higher boost target the charged air coming out of the compressor is hotter, therefore increasing IAT's.  To compensate for the higher IAT's the ECU (DME) reduces boost, timing, and overall power to the engine.  This is the exact opposite of what you want for getting your F25/F26 X3/X4 to perform better.  In order to keep those IAT's low, a larger and more effective intercooler is needed. 

HIGHLIGHTS

• Increase HP / TQ
• 120% Larger Front Area
• 94% More Efficient than OEM
• Fully Reversible

CONSTRUCTION

The ARM F25/F26 X3/X4 FMIC is the perfect cooling solution for any stock turbo or upgraded turbo N20/N55 setup.  With an intercooler core size of 20x11x3" and an overall volume of 660cu in. the ARM F25/F26 FMIC is 235cu.in. or 36% larger than the stock N55 intercooler which comes in at only 425cu in.  In addition, the ARM F25/F26 X3/X4 FMIC utilizes an ultra-dense 14 fins per inch external core, giving it the best cooling performance possible.  


With a 220sq.in. face the ARM F25/F26 X3/X4 FMIC has a 120% larger frontal area than the OEM intercooler with only a 100sq.in. face, and 55sq.in. or 33% larger than most aftermarket intercoolers for the F-Series platform.  Having a larger frontal area equates to more effective cooling compared to intercoolers of similar total volume.  In the milliseconds that the ambient air passes through the intercooler it warms up, making the actual cooling less effective towards the rear of the intercooler.  Taking the area towards the rear of the intercooler and bringing it towards the front improves the overall ability of the FMIC to cool the charged air on the X3/X4.  This is shown in our IAT testing results below. 

INTAKE AIR TEMPERATURE RESULTS

Our baseline run was performed on a 335i running 16psi of boost with the stock F-Series intercooler.   The 3rd gear run started at 93 degrees and ended at 126 degrees, a huge increase of 33 degrees Fahrenheit on 16psi of boost, and certainly restricting the amount of power this N55 could have been making.


After installing the ARM F-Series FMIC there was a massive improvement in cooling performance that resulted in only a 2 degrees Fahrenheit increase in IAT. In this 3rd gear run with boost peaking at 18psi, which is 2psi higher than the stock intercooler run, it starting at 95 degrees and ended at only 97 degrees. This is a 94% improvement in cooling over the OEM F30 intercooler!  

INSTALLATION

Installation of the ARM F25/F26 X3/X4 FMIC upgrade is a basic bolt-on procedure similar to the F30 FMIC installation, but with the addition of trimming one small piece of plastic measuring 1x3", or about the size of a stick of gum.  It does not require you to remove the front bumper.  It is a direct fit which bolts up into the original stock intercooler location.  The CNC connectors will connect to either the stock F30 intercooler piping or to any upgraded intercooler piping that fits the stock intercooler.  


IN THE BOX

• ARM F25/F26 FMIC
• OEM Style Connectors
• Mounting Hardware
• Hoses and Clamps
 

FITMENT GUIDE

 Make Chassis Model Engine
BMW F25 X3 xDrive28i N20
BMW F25 X3 xDrive35i N55
BMW F26 X4 xDrive28i N20
BMW F26 X4 xDrive35i N55

 

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.
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SKU: 39980167461

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Sam K.
Massapequa, US
★★★★★ 5
Socks
Size: Medium, Color: Black
Amazing socks. Fits Amazing. I tried to buy the six pack and it wasn’t the same. Thinner material. The 3 pack is great. Would buy again if it comes up.
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Reviewed in the United States on September 16, 2025
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Tyler W
Chelsea, US
★★★★★ 4
Amazing socks but false advertising. They changed them.
Size: Large, Color: Black (6-pairs)
Okay well I have 4 stars because these are the best socks ever, infact, I threw out all my other socks and switched to just these. No show and they never slip. THE PROBLEM NOW, all the pairs I ordered before had a white symbol, and every time I buy more they have the grey and they are not as low show as my others… I wanted to simplify life and have all the same kind, no matching of colors or slightly different shape, but 4 times now I’ve ordered white symbol and gotten thicker longer ones with gray symbols. I’m considering switching all of my socks to the gray…. But the white symbol ones are way better, they don’t show with hey dudes on and gray symbol ones do now. I’m at a loss. Can someone tell me where to buy 100 pairs of white symbol so I never need to buy another sock again in my life?
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Reviewed in the United States on January 24, 2025
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lovecolor1
Los Angeles, US
★★★★★ 5
My favorite
Size: Medium, Color: Opal Blue/White/Cruise Blue (3-pairs)
My favorite socks, too bad under armour discontinued the cotton blend fabric and went to 100% polyester 😠
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Reviewed in the United States on March 16, 2026
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Natalie Williams
Boise, US
★★★★★ 5
Comfortable
Size: 6-10, Color: Halo Gray/Assorted
These are my favorite socks!
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Reviewed in the United States on September 22, 2025
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The bookish health nut
San Leandro, US
★★★★★ 5
Absolutely Essential for Any Athlete or Gym-Goer!
Size: Large, Color: (035) Steel / White / Black
I recently purchased the Under Armour Unisex-Adult Training Cotton No Show Socks 6 Pack, and I must say, they've become an indispensable part of my workout gear. Here's why these socks are a game-changer: Comfort Above All: These socks are incredibly comfortable. Made from a blend of cotton and synthetic fibers, they provide just the right amount of cushioning without feeling bulky. Whether I'm running, lifting weights, or doing yoga, my feet feel supported yet free. No Show, All Go: True to their name, these socks stay perfectly in place without slipping down into my shoes. This is crucial for maintaining a professional look at the gym or during sports activities. No more embarrassing sock peeks or having to constantly adjust them. Durability: For the price, these socks hold up remarkably well. I've washed them multiple times, and they haven't lost their shape or elasticity. They've survived the rigors of both my workouts and laundry day. Breathability: The material mix allows for excellent breathability. My feet stay dry and cool, reducing the chances of blisters or discomfort during long sessions. Pack Value: Getting six pairs in one go is fantastic. It means I always have a fresh pair ready, which is perfect for someone like me who works out frequently. Fit for All: These socks fit true to size and are designed to be unisex, making them a versatile choice for anyone looking to upgrade their sock game. If you're in the market for socks that combine comfort, performance, and style, look no further. Under Armour has nailed it with these no-show socks. They've quickly become a staple in my wardrobe, and I find myself reaching for them over any other sock I own. Highly recommended for anyone serious about their fitness routine or just wanting reliable, high-quality socks. 5 out of 5 stars - These socks are a must-have!
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Reviewed in the United States on August 25, 2024

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