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Description
BMW S55 MIDPIPE UPGRADE - 3.5" RESONATED30 Day Money Back Guarantee IN STOCK HIGHLIGHTS Up to +20whp 30wtq Improved Exhaust Note 304 Stainless Steel Faster Turbo Spool Fits OEM and Aftermarket Mufflers PROFILE Introducing the ARM Motorsports S55 Single Midpipe Upgrade for the F8X platform, the ultimate solution for S55 enthusiasts seeking to enhance the power and sound from their S55 powered BMW. This S55 Midpipe upgrade delivers improved exhaust flow and an incredible exhaust note due to
- 30 Day Money-Back Guarantee | IN STOCK
HIGHLIGHTS
• Up to +20whp / 30wtq
• Improved Exhaust Note
• 304 Stainless Steel
• Improved Exhaust Note
• 304 Stainless Steel
• Faster Turbo Spool
• Fits OEM and Aftermarket Mufflers
PROFILE
Introducing the ARM Motorsports S55 Single Midpipe Upgrade for the F8X platform, the ultimate solution for S55 enthusiasts seeking to enhance the power and sound from their S55-powered BMW. This S55 Midpipe upgrade delivers improved exhaust flow and an incredible exhaust note due to the resonated 3.5" design. Check out the clips below to hear the ARM S55 Midpipe paired with the ARM S55 Resonated Downpipes.
CONSTRUCTION
Crafted from 304 stainless steel, the ARM S55 Midpipe Upgrade is built to last. Its mandrel-bent tubing ensures smooth, unrestricted flow, while the lightweight design of only 17lbs reduces overall weight of the exhaust system by 15lbs. When paired with the ARM S55 Track Exhaust, you shave an incredible 40lbs off compared to the OEM exhaust system.The ARM S55 Single Midpipe starts at the downpipe connections with a precision Y-pipe. This allows you to connect the ARM S55 Midpipe to any downpipe upgrade that fits the OEM S55 Midpipe, including the ARM S55 Downpipes.
This section of the ARM S55 Midpipe includes a 4.5" resonator to tune the tone of the exhaust into a deeper, more desirable range, as the S55 is notorious for having a high-pitched, raspy exhaust note. Paired with the ARM S55 Downpipes, the ARM S55 Midpipe will make your F8X one of the best sounding on the road.
Due to the larger size of the ARM S55 Midpipe, the OEM under-brace cannot be utilized. To address this, the ARM S55 Midpipe includes a specially designed under-brace that is specifically engineered to fit with the larger midpipe. The under brace included in the ARM S55 Midpipe Kit is designed with precision and manufactured from 6061 aluminum to ensure strength, durability, and a perfect fit, while keeping the weight to a minimum. Installation of the under brace is a simple bolt-on process and mounts directly to the factory mounting points, ensuring a secure and stable fit.
IN THE BOX
• ARM S55 Midpipe
• CNC Machined Brace
• 5x Exhaust Clamps
• CNC Machined Brace
• 5x Exhaust Clamps
FITMENT GUIDE
The ARM S55 Midpipe Upgrade will fit any downpipes that connect to the OEM midpipes.
| Make | Model | Submodel | Engine |
|---|---|---|---|
| BMW | F80 | M3 | S55 3.0L |
| BMW | F82 | M4 | S55 3.0L |
| BMW | F83 | M4 | S55 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. The warranty entitles you to a replacement unit.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 20 reviews
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Product Reviews
★★★★★ 4
Good for (non-destructive) small dogs
Color: Red
Bought for a small dog, would not recommend for a destructive chewer. After some initial hesitation this has become her favorite toy and keeps her entertained for a good while. The different settings provide some variety to how she can play with it. The battery only lasts about an hour, but it does charge quickly. As others have noted the string is garbage.
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Reviewed in the United States on June 6, 2026
★★★★★ 5
Cool gadget for you puppy!
Color: Red
Do you need a break sometime? Something that you puppy can play with for 20 or 30 minutes at a time? This is it! It goes around the place in random paths that will keep your puppy entertained and amusedZ. It not to loud and it lasts a long time and nothing has broken off form the rough play at all.
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Reviewed in the United States on June 9, 2026
★★★★★ 5
Great for small dogs with a big prey drive!
Color: Red
He loves it!! I have a small dog with a big prey drive and he goes absolutely crazy for this! A big plus for taking the boredom away, really perking up his mental attitude. It's also (at this moment) much cheaper than others that look very similar. Super easy to charge. My dog is a rescue and never learned to play with toys, has zero interest in stuffed toys and doesn't really understand play, but this isn't play to him: It's what he was born to do. He gives it a hearty Two Paws Up!
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Reviewed in the United States on June 1, 2026
★★★★★ 5
Our Yorkie Puppy Loves This Toy!!!
Color: Red
Warning: your pet may become completely obsessed
I’ve had this toy for about a year for my Yorkshire Terrier, Gia, and it’s easily the most successful toy purchase I’ve ever made. We even had to replace the first one after she loved it a little too much (chewed the string off), and have since bought more as gifts for friends’ pets. Great toy for small dogs (too fragile for bigger dogs) and active, young cats.)
What we love:
* Endless engagement: Gia ignores all her other toys and goes straight for this every time
* Interactive features: Subtle beeping + changing colored lights + unpredictable rolling patterns keep her hooked
* Energy burner: Perfect for indoor play on hardwood floors—she will chase it nonstop
* Rechargeable: Battery lasts several hours, even with frequent use
* Durability: Holds up well considering how rough she plays
Real-life note:
Gia will literally bring this toy to me to get me involved—and I have to limit her playtime because she won’t stop on her own.
Bottom line:
If you have a high-energy dog (or even a playful cat), this isn’t just a toy—it becomes their favorite activity… and possibly their entire personality.
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Reviewed in the United States on April 25, 2026
★★★★★ 3
I wanted it to be a good fit
Color: Red
This toy garnered my dogs attention for a day. We tried it inside but there's too many places it would go under. We tried ot outside and it was powerful enough in the grass so tried concrete patio. My dog lost interest sadly. It wasn't a good product for my dog.
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Reviewed in the United States on June 5, 2026