FMF BMW N54 2-BOLT DOWNPIPE-TO-CATBACK FLANGE / CAT-BACK FLANGE

Rebuild Your BMW N54 Exhaust with a Heavy-Duty 2-Bolt Downpipe-to-Cat-Back Flange

Cracked, warped, or damaged N54 exhaust flange? The FMF 2-Bolt Downpipe-to-Cat-Back Flange provides a strong, durable connection point for rebuilding or upgrading a compatible BMW N54 exhaust system.

Use it to repair a damaged connection, correct fitment from a previous exhaust modification, or fabricate a custom downpipe, mid-pipe, or cat-back exhaust.

Manufactured from heavy-duty 3/8-inch 304 stainless steel, this weld-on flange is built to withstand the heat and corrosion associated with demanding exhaust applications.

Key Features

• 3/8-inch-thick 304 stainless steel
• Accepts 2.5-inch exhaust tubing
• Two-bolt flange design
• Excellent heat and corrosion resistance
• Ideal for custom exhaust fabrication and repair
• Suitable for compatible BMW N54 exhaust systems
• Weld-on fabrication component
• Sold individually

Compatible BMW N54 Applications

• BMW E82 135i
• BMW E90 335i
• BMW E92 335i
• BMW E93 335i
• Other N54 applications using the same flange dimensions

Product Specifications

• Brand: Fusion Motorsport Fabrication (FMF)
• Product Type: Downpipe-to-cat-back exhaust flange
• Material: 304 stainless steel
• Thickness: 3/8 inch
• Tube Size: 2.5 inches
• Bolt Configuration: Two-bolt
• Installation Type: Weld-on/custom fabrication
• Quantity: One flange

Frequently Asked Questions

What type of flange is used for a BMW N54 downpipe-to-cat-back connection?

Compatible BMW N54 exhaust systems commonly use a two-bolt flange at the downpipe-to-cat-back connection. This FMF flange accepts 2.5-inch exhaust tubing and is manufactured from 3/8-inch 304 stainless steel.

Will this fit my factory or aftermarket N54 exhaust?

Fitment depends on the vehicle, downpipe manufacturer, cat-back system, and previous modifications. Compare the flange shape, bolt spacing, and tubing size with your existing components before ordering.

Does this flange need to be welded?

Yes. This is a weld-on exhaust-fabrication component, not a complete bolt-on replacement. Professional welding and exhaust-fabrication experience are recommended.

What's Included

• One FMF BMW N54 two-bolt stainless-steel exhaust flange

Fusion Motorsport Fabrication — Precision-built components for serious exhaust fabrication.