Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 4 - Jul 9
Promo Codes Available:
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
4.5 ★★★★★
Based on 2018 reviews
Sort
Product Reviews
★★★★★ 3
Runs large
Size: 7 Big Kid, Color: White
Runs very large.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 5, 2026
★★★★★ 5
a little roomy for narrow feet.
Size: 6 Big Kid, Color: Black/Black
Nice shoes. My little one has narrow feet so they are a little lose. Overall, a nice shoe.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 4, 2026
★★★★★ 5
comfortable
Size: 7 Big Kid, Color: Black/Black
super comfortable!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
★★★★★ 5
Great shoes
Size: 5 Big Kid, Color: Navy/Blue
Loved them but bought a size too small so had to buy another pair…my bad 🤦🏽♀️
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
★★★★★ 4
Comfortable and Easy to Wear Daily
Size: 2 Little Kid, Color: Navy/Blue
My daughter has been wearing these navy/blue shoes since the weather has been less rainy and more sunny. They are great for outdoor play, especially on days when it's warm outside. The knit mesh upper keeps her feet from overheating, and the cushioned insole feels supportive without being stiff. At size 2, the fit is accurate and the width runs a bit roomy, which gave her some growing room without feeling loose.
The slip-on design with elastic laces and pull tabs is a real plus. She can get them on and off without any help, which she loves. The shoes are light enough that she barely notices them during long active days. My one small complaint is that the sole feels more like firm foam than rubber, so they can be a little slippery on smooth indoor floors.
For the price, these deliver solid everyday value. They look good, hold up well to regular use, and my daughter reaches for them first most mornings.
Pros:
- Breathable mesh keeps feet cool
- Easy slip-on design with elastic laces and pull tabs
- Lightweight and comfortable for all-day wear
- Accurate sizing with a roomy width
- Durable for the price
Cons:
- Sole can be slippery on hard smooth surfaces
- Limited outsole grip compared to rubber-soled shoes
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 1, 2026