MAD

MAD BMW S58 4" Fat Boy Single Midpipe M3 M4 G80 G82

Regular price $849.00
Quality Content

G8X M3 / M4 4" FATBOY Midpipe – Flow Is Everything

Flow is everything and the new MAD 4" FATBOY Midpipe delivers exactly that.

Designed specifically for the G8X M3/M4 platform, this midpipe is built to maximize performance and sound without compromise. Featuring a full-length single 4" center section and a minimum pipe diameter of 3" throughout, the FATBOY Midpipe is all about maintaining optimal exhaust flow from front to back.

Expect a deeper, more aggressive tone with significantly less rasp, even when paired with aftermarket downpipes. Whether you're pushing the limits on track or just want that perfect balance of refined aggression on the street, the FATBOY Midpipe transforms your G8X's character in all the right ways.

Key Features:

  • Full-length single 4" center section

  • Minimum 3" diameter throughout for consistent flow

  • Deeper, more refined exhaust note with reduced rasp

  • Perfect pairing with aftermarket or stock downpipes

  • Includes 3" and 2.75" reducer couplers to connect to 3'' aftermarket axle-backs such as ours or factory axle-back systems

  • Utilizes Oem Cut location and clamp design for easy installation and reversibility

Quality Content

We try to keep all the products that are listed our site in stock, with short lead times, but with so many product offerings, it's not always possible to do so.

Products are kept in stock with our vendors, distributors, or partnered warehouses.

Please note: some products are custom made. For these products, check product description for lead times.

To check item stock or lead time please contact our support staff.

Orders are processed within 1-5 business days after order placement. Business days are Monday-Friday.

Most orders are delivered within 7-10 business days of order shipment.

Please note: some products are made to order or have longer lead / shipping times. Review product description for this information.

If product is out of stock or has longer lead time we will notify you.

To review fitment, check the fitment tab on the product description.

If you're still unsure, please contact our support staff.