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Description
3.5" Resonated Midpipe For S55 BMW F80 M3, F82 M4, F83 M4 - ARM MotorsportsIntroducing 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. HIGHLIGHTS Up to +20whp 30wtq Improved
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.
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
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 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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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
4.1 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 5
That ending 😫
Format: Kindle
I fell into a false sense of security and really thought this was gearing towards a happy ending. Then I realized there’s no work they don’t punish Andrew. I really liked Vale’s character. I don’t normally read books with pregnancy but going into this knowing she was pregnant made it more enjoyable for me.
I loved Bishops devotion to her and her happiness. I also loved that Holt and Mercy couldn’t fight their attraction to her. I love scent matches so very much. I’m so curious to see how this duet will end up. And I need to pay more attention and notice that a book I’m starting is a duet to begin with lol
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 21, 2025
★★★★★ 5
oh wow
Format: Kindle
I just knew there was something about Cooper! I’m wondering if he’s about to be included but damn I’m glad he’s at least not a rapist and creepy guy, he just got called on assignment and had to go! This should be interesting! She’s gonna run and then what’s his face is gonna grab her. I’m worried! Wow that was a great book and cliffhanger! Loving this!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 27, 2025
★★★★★ 5
ABSOLUTELY A MUST for Omegaverse Girls!!!
I ABSOLUTELY LOVE Jillian West and her books!!! I’m so happy I already bought book two and now I have to buy the others for the Assurance Security series!!
Not gonna lie Val kind of annoyed me at the beginning but she grew on me!! Her men are chef’s kisses!!! Holt annoys me some but I can let it slide. I already bought part two so I’m going to be reading that in between work phone calls!!!! DON’T TELL MY BOSS 😂😂😂😂
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 30, 2025
★★★★★ 4
Baby bumps and bodyguards
Format: Kindle
Dark, emotional, and unexpectedly tender, Not Ready is an omegaverse romance that delivers found family feels, fierce protectiveness, and a very pregnant heroine who refuses to break. Vale’s on the run from a stalker, but lands in the arms of three private security alphas, cue the swoony tension, fake marriage twist, and slow-burn heat.
It’s a little gritty, a little soft, and a whole lot addictive. If you love protective alphas, high stakes, and heroines with quiet strength, this one’s a must-read.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 18, 2025
★★★★★ 5
Strong Omegaverse Comfort and a Attention Grabbing Plot
Format: Kindle
Jillian West never misses when it comes to Omegaverse, and Not Ready is no exception. This story was the perfect blend of cozy comfort and emotional depth while still delivering a strong plot.
Vale is such a powerful heroine, she is strong, capable, and determined but I love that she still allows her pack to love and take care of her. It’s that balance of independence and vulnerability that makes her so relatable.
The relationship dynamics were amazing: Bishop is steadfast and completely head over heels, Mercy is skeptical but protective in his own way, and Holt is the hesitant one whose slow fall is so satisfying to watch unfold.
The romance hits that sweet spot between insta-love and cautious build, keeping me hooked the entire way through. And that ending. Oh my god, the cliffhanger! I need the next book in this duet immediately.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 28, 2025
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