Introducing the RK Titanium SIGNATURE Edition Single Exit Exhaust for the BMW G20 M340i and G22/G26 M440i platform — the premium performance exhaust enthusiasts have been asking for.

Inspired by the success of our Supra MK5 single-exit system, this G-Series BMW exhaust brings the same aggressive styling, ultra-lightweight titanium construction, and unmatched sound refinement to your M340i or M440i.

Unmatched Lightweight Performance

Crafted from aircraft-grade titanium, the SIGNATURE Edition weighs just 14.5 lbs, shedding nearly 60 lbs compared to the factory exhaust. Its 3.5-inch straight-through, free-flowing design maximizes exhaust flow and is perfect for single turbo upgrades or anyone seeking quicker spool, sharper throttle response, and improved top-end power.

Precision Fitment + Universal Downpipe Adapter

Our modular adapter system allows this exhaust to mate with virtually any aftermarket downpipe that retains the OEM location.
Note: Please verify the actual outlet size of your downpipe, not the advertised size.

Signature Sound vs Track Edition

What sets the SIGNATURE Edition apart?

• Signature Edition → Includes our RK Signature Muffler for that iconic deep, refined RK Titanium tone

• Track Edition → Straight-pipe design for the loudest, rawest sound possible

Both systems share the same modular architecture, allowing you to swap rear sections effortlessly between Signature and Track configurations.

Hand-Built Craftsmanship — Made in the USA

Every RK Titanium system is hand-built, TIG welded, and back-purged in the USA, ensuring unmatched quality, durability, and performance. This is truly a boutique titanium exhaust built by enthusiasts, for enthusiasts.

Product Details

• JDM-style single-exit design

• Full 3.5” titanium construction

• Hand-built, TIG-welded, and back-purged

• Free-flowing straight-through system

• Lightest-in-class at just 14.5 lbs (including hardware)

• Modular rear section for Signature ↔ Track swapping

• Designed and manufactured in the USA

• Lifetime RK Titanium Warranty against defects

Build Time & Policy

All RK Titanium products are built to order.
Lead times typically range 6–10 weeks depending on production volume.

Please review all store policies before ordering.
No cancellations or returns after 5 days.