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Description
S58 Crossover Pipe For BMW G80 M3, G82 M4, G83 M4The ARM S58 Crossover Pipe is designed to replace the restrictive factory S58 crossover pipe with a fully round design that improves exhaust flow. Unlike the OEM oval shaped pipe, the ARM crossover pipe maintains a consistent round shape, eliminating turbulence and flow restrictions caused by the factory design. Exotic exhaust sound Precision laser cut flanges Compatible with OEM and upgraded midpipes SS304 stainless steel construction 4 lbs lighter
The ARM S58 Crossover Pipe is designed to replace the restrictive factory S58 crossover pipe with a fully round design that improves exhaust flow. Unlike the OEM oval-shaped pipe, the ARM crossover pipe maintains a consistent round shape, eliminating turbulence and flow restrictions caused by the factory design.
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Exotic exhaust sound
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Precision laser-cut flanges
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Compatible with OEM and upgraded midpipes
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SS304 stainless steel construction
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4 lbs lighter than OEM
ENHANCE THE SOUND OF YOUR S58
The ARM S58 Crossover Pipe removes the extra casting material and sound deadening of the OEM S58 crossover pipe, allowing an increase in sound your S58 produces. The G82 M4 in the video below is equipped with the ARM S58 Midpipe, S58 Crossover Pipe, and ARM S58 Downpipes, providing an increase in volume over the OEM setup. Pairing the ARM S58 Midpipes with the ARM S58 Downpipes will increase the overall volume of your S58 significantly more than the ARM S58 Crossover Pipe alone.
CONSTRUCTION
The ARM S58 Crossover Pipe is built with SS304 stainless steeland is completely round. The ARM S58 Crossover Pipe starts at the end of the left downpipe utilizing and OEM style 2 bolt flange and crosses over the underbody to the driver side midpipe connection. The flange on the midpipe side of the ARM S58 Crossover Pipe is designed to accommodate the midpipe gasket perfectly.
The ARM S58 Crossover Pipe is designed to work with ARM S58 DownpipesandARM S58 Midpipes, but is also compatible with the OEM downpipes and midpipes or upgraded downpipes and midpipes that utilize OEM style connections.
Explore Aftermarket Parts Collection For G8X S58 Vehicles
The ARM S58 Crossover Pipe is designed to work with ARM S58 DownpipesandARM S58 Midpipes, but is also compatible with the OEM downpipes and midpipes or upgraded downpipes and midpipes that utilize OEM style connections.
Explore Aftermarket Parts Collection For G8X S58 Vehicles
IN THE BOX
• 1x ARM S58 Crossover Pipe
• 2x Mounting Bolts/Nuts
• 2x Mounting Bolts/Nuts
FITMENT GUIDE
| Make | Model | Submodel | Engine |
|---|---|---|---|
| BMW | G80 | M3 | S58 3.0L |
| BMW | G80 | M3 Competition xDrive | S58 3.0L |
| BMW | G82 | M4 | S58 3.0L |
| BMW | G82 | M4 Competition xDrive | S58 3.0L |
| BMW | G83 | M4 | S58 3.0L |
| BMW | G83 | M4 Competition xDrive | S58 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.
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.
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
4.1 ★★★★★
Based on 26 reviews
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Product Reviews
★★★★★ 5
Beautiful
Color: Black, Size: 40"W x 8"D, 2 Pack
I love my shelf, looks gorgeous over my electric fireplace.sturdy and the perfect size. Would purchase again.
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Reviewed in the United States on March 26, 2026
★★★★★ 5
Perfect for what I need.
Color: Rustic Brown, Size: 40"W x 12"D, 2Packs
These floating shelves are perfect for the price. There a number of things that I think other reviewers just get wrong. Here are some thoughts and tips:
1) QUALITY: Yes, these are not super high quality. They are not real wood and they are hollow. BUT, real wood is more expensive. You're getting two shelves for about $100. if you want higher quality then you'll have to spend more. For me, i wanted something that looked good and could store knick-knacks. And these certainly fit the bill. It amazes me how people who spend the least always demand the most.
2) STRENGTH: Some people have said these aren't very strong and sag at the ends. These are floating shelves and the ones I got were 12 inches deep. That is a significant amount of leverage on the mounting hardware. it's not that the shelves or the mounts are cheap; it's that physics simply makes floating shelves like this inherently less stable and unable to hold significant weight.
SOLUTION: You have a number of things here that will add to stability. This company provides a generous amount of screws and anchors. USE THEM. If the shelf is long enough, make sure you catch at least two studs to anchor into. There are a decent number of screw eyelets in the mount and they are wide, meaning you have room to play. Finding a stud to mount into should not be too challenging. So that's two screws right there. As for the other eyelets, you will be forced to use wall anchors. Wall anchors are another one of those things that are simply inherently not that strong. They are not meant to take much of a load. But the more you can use, the better. Just know that those can provide some stability but they really don't add a tremendous amount of added strength.
Additionally: if you have a 3d printer or know someone who does, print a support. I was able to find some really discreet supports to print that do not detract from the floating nature of these shelves. If you mount them on one or two sides, you'll have far less "sagging". The additional supports will add significant strength and stability. Given the magic of 3d printing filament, you can literally get any color you need so that you can blend seamlessly into the wall (or just print whatever color and then paint it). If you can use PETG or ASA, or some other strong filament, then you'll be golden. PLA can definitely be used, but just be familiar with the strength limitations of PLA.
All in all, these do the job. They are attractive and support just enough weight to serve their purpose.
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Reviewed in the United States on April 20, 2026
★★★★★ 5
THE only shelf you need!
Color: Black, Size: 24"W x 12"D, 2Packs
Great shelves! Easy to install, all the hardware is included and they look amazing!
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Reviewed in the United States on April 25, 2026
★★★★★ 4
Not Wood
I probably didn’t read descriptions well. They are a lightweight plastic material that looks like wood. Seem durable. The shelf could sit further onto bracket and flush to wall. Also will need to shim where tubes enter shelf. They are a little wobbly on brackets. But, overall I do like them!
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Reviewed in the United States on June 4, 2024
★★★★★ 2
Poor Quality for the price
Color: Walnut, Size: 36"W x 12"D, 2Packs
I have had these for about a week and so far i am not happy with them. They look good up but they are made only of thin particle board, the brackets do not not hold tight, i used the included Sheetrock holders and screws and i think the screws are to big for the holders and just dont hold well. Currently my shelves are empty because when i put something on them the shelves tilts forward. I am trying to decide if i can fix somehow or if I should just return them.
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Reviewed in the United States on April 13, 2026
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