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Ships within 48 hours · Estimated delivery Aug 13 - Aug 18
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Description
Active Autowerke Signature Exhaust System - S55 F8X BMW M3 & M4 - (NLA)Active Autowerke is proud to announce the release of our Signature F8X M3 M4 Exhaust System. This system is the result of countless hours of R&D to obtain the perfect combination of performance and sound. Constructed of 100% 304 TIG welded stainless steel, we have created a modular exhaust system that will provide enough flow to support power levels way above the stock S55. The stock S55 midpipe is a dual pipe system from each turbo that leads to the
Active Autowerke is proud to announce the release of our Signature F8X M3/M4 Exhaust System.
This system is the result of countless hours of R&D to obtain the perfect combination of performance and sound. Constructed of 100% 304 TIG welded stainless steel, we have created a modular exhaust system that will provide enough flow to support power levels way above the stock S55.
The stock S55 midpipe is a dual pipe system from each turbo that leads to the rear muffler. The resulting sound is far from pleasant, and without any real scavenging effect the turbo lag is fairly pronounced. By converting to a single 3.5" pipe directly after the downpipes, our system promotes exhaust scavenging along with higher exhaust velocity to produce a quicker spool, more power, and a much smoother exhaust note.
We believe that we’ve built the best performing exhaust on the market. With the reduced back pressure and large single-pipe design you can expect exhaust velocity to remain as high as possible throughout the entire system. Our design is also capable of handling much higher power levels than stock. It’s over engineered to have no issues handling the increased exhaust volume from extensive modifications including turbo upgrades. All Active Autowerke exhausts are designed and manufactured for performance, and our S55 exhaust is no different. Instead of copying the OEM exhaust, we started with a blank canvas in order to create a system as close to perfect as possible.
MADE IN THE USA
KEY FEATURES:
- Mandrel bent 304-stainless construction
- Completely TIG Welded (No MIG Welding at all)
- Flow efficient Y-Pipe design
- Perfect fitment with adjustable 90mm double walled tips
- True 3.5” turbo back design
- Uses OEM valve motor
- Designed to be used at stock power levels along with highly modified engines
- No permanent modifications required
- Manufactured in house at our facility in Miami, FL.
***These systems are built to order and require a 2-3 week lead time before shipping.
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
4.8 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 3
Too Much Back, Ain’t Enough Slack
Color: Brown, Size: 36W x 30L
Sadly the color doesn’t quite match the photo—it looks cheaper IRL. However, the form of the pants are cool, but they don’t fit me.
TLDR: These pants aren’t for guys with back. Good looking style though.
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Reviewed in the United States on May 1, 2026
★★★★★ 5
Good job
Color: White, Size: 36W x 30L
These pants are awesome
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Reviewed in the United States on August 7, 2025
★★★★★ 2
Color was off. More plum than burgundy
Color: Burgundy, Size: 36W x 32L
The color was more plum than burgundy. I returned them. Not a plum pants kind of guy. I have gotten other colors. I actually love the fit.
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Reviewed in the United States on April 14, 2026
★★★★★ 1
Do not trust sizing or measuents
Color: Black, Size: 32W x 30L
Sizing way off. Can barely fit on and no where close to buttoning. Same pant measurements in another pant bought at the same time no problem. Sizing and measurements off.
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Reviewed in the United States on May 23, 2026
★★★★★ 5
Nice
Size: 40W x 32L, Color: Beige
Very nice. Real quality. Would definitely purchase again.
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Reviewed in the United States on May 29, 2026