The Ultimate Rear Upgrade: E90 / E91 Dual-Exit Performance Diffuser

Fitment: BMW 3-Series E90 (Sedan) & E91 (Touring) — M-Sport Rear Bumpers.

Standard diffusers look fine, but nothing says "performance" like a symmetrical dual-exit setup. Specifically designed for the 335i, 335d, or those performing a custom dual-exit exhaust conversion, this diffuser provides the aggressive, balanced look that the E90/E91 chassis was meant to have.

Available in a deep Gloss Black for a modern stealth look, or Carbon Fiber Look for the ultimate motorsport finish.

The Dual-Exit Advantage

Symmetrical Perfection: Features precise cutouts on both the left and right sides to perfectly frame dual-exit exhaust tips.
Large Tip Clearance: Designed with generous spacing to accommodate larger aftermarket tips (up to 4" / 101mm) without heat-related contact.
Deep Aero Fins: The center section features sharpened aerodynamic fins that draw the eye downward, giving your BMW a lower, more aggressive "track-ready" stance.
Quality Construction: * Gloss Black: Made from impact-resistant, high-grade ABS plastic.

Compatibility & Specifications

Feature	Details
Bumper Fitment	M-Sport / M-Tech Bumpers Only
Exhaust Setup	Dual Exit (One on the Left, One on the Right)
Models	E90 (Sedan) & E91 (Touring) — LCI & Pre-LCI
Finish Options	Piano Black or Carbon Fiber Look

Installation Notes

This is a direct-replacement part for the factory M-Sport diffuser insert. It utilizes the original mounting tabs and screw locations.

For 335i/335d owners: This is a direct swap for your factory trim.
For 325i/328i/330i owners: This is the essential part needed if you are upgrading your exhaust to a dual-exit 335-style system.

Technical Tip: For the cleanest look, ensure your exhaust tips are centered within the cutouts. We recommend professional installation to ensure all clips are securely engaged for high-speed stability.