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Ships within 48 hours · Estimated delivery Aug 17 - Aug 22
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For Your Every Summer RSVP, with Code: SUMMER15
Description
Fabspeed Valvetronic Exhaust System - BMW F8X M3 | M4The ultimate catback exhaust system for the Ultimate Driving Machine includes Fabspeed's high performance Valvetronic rear muffler and exclusive "Double X" midpipe for the perfect combination of sound and power. Power Gains: Peak Power Stock= 410 whp 400 ft lbs Exhaust = 419 whp 414 ft lbs Maximum Gains 3300 RPM = +19whp +31ft lbs Weight: Factory BMW System: 69lbs Fabspeed System: 62lbs Rear Section: 33lbs Mid Pipes: 29lbs Features: Fits all BMW F8x
The ultimate catback exhaust system for the Ultimate Driving Machine includes Fabspeed's high performance Valvetronic rear muffler and exclusive "Double-X" midpipe for the perfect combination of sound and power.
Power Gains:
- Peak Power
- Stock= 410 whp / 400 ft/lbs
- Exhaust = 419 whp / 414 ft/lbs
- Maximum Gains
- 3300 RPM = +19whp / +31ft/lbs
- Factory BMW System: 69lbs
- Fabspeed System: 62lbs
- Rear Section: 33lbs
- Mid-Pipes: 29lbs
Features:
- Fits all BMW F8x M3 & M4 sedan / coupe vehicles (2015+) - Does not fit F83 convertibles
- Adds 19 whp and 31 ft/lbs of torque at 3300 RPM
- Includes Deluxe Quad-Style Tips in a Polished Chrome, Black Chrome, or Single Wall Brushed finish
- World's first and only "Double-X" midpipe design includes two "x" sections for increased exhaust scavenging, resulting in the smoothest possible exhaust note with the least amount of rasp
- Constructed in-house at Fabspeed from 16ga / .065" thick CNC mandrel-bent T304L stainless steel in 2.75" diameter for the best durability
- Integrated muffler valves include machined mounts for the factory actuators, allowing retention of factory valve functionality
- Note: Fabspeed’s product mentioned above is not C.A.R.B. certified and are for Off-Road Use ONLY in the state of California. The purchaser or end user of this product is responsible to contact their state/county jurisdiction of their country of origin to see if this product is compliant with their local road usage.
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
4.6 ★★★★★
Based on 14 reviews
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Product Reviews
★★★★★ 4
Good for the price but not as roomy as a North Face.
Size: X-Large, Color: Black
The jacket is lightweight and warm. It isn’t as roomy as a North Face puffer jacket but fits me fine (6’1, 190). I find that when I zipper it to the top, it irritates my throat area a little. The color is what showed in the picture.
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Reviewed in the United States on March 14, 2026
★★★★★ 5
Great Puffer!
Great for the price. I live in south east Michigan and this puffy is so warm but also light. Would buy again.
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Reviewed in the United States on May 3, 2026
★★★★★ 1
Not very puffy puffy jacket
Size: XX-Large, Color: Denim Blue
At xxl the shoulders fit well and perhaps the first jacket where the sleeves came down to my wrists and not halfway to my elbows if I reached forward. Love the zipper. The zipper pull is at my right hand side. It is where i would use my right hand to engage and pull it closed. The zipper glides smoothly. The hood is voluminous. There is no string available to control the fit of the hood. As it us the hood is much too large. It makes the jacket look cheap and unfinished. The jacket would be immeasura bly better if the was a bit more fill in the body and a string pull in the face of the hood to bring the fit closer.
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Reviewed in the United States on February 11, 2025
★★★★★ 5
It's thin but it's good for cooler mornings and windy days
This jacket is not super thick or sherpa/fleece lined. But it's great for cooler temperatures, windy days, or staying warm while out on a boat. It's lightweight, cuts the wind and is great for layering. Folding it into the bag makes it ideal for travel and camping
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Reviewed in the United States on January 9, 2026
★★★★★ 3
Okay for the price
Size: XX-Large, Color: Denim Blue
The product was light and compact for packing for an Alaska cruise. It was also sufficiently warm and relatively rain resistant. But on the second day of wearing, the zipper blew out. I was able to fix for a short while, but in the end, I couldn’t use it.
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Reviewed in the United States on September 24, 2025
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