Turner Motorsport E46 323/328 Valved Cat-Back Exhaust

Upgrade your BMW E46 323/328 with the Turner Motorsport Valved Cat-Back Exhaust, a lightweight, high-performance system engineered for both sound and flow. The integrated valved muffler lets you switch instantly between a refined, quiet tone for daily driving and a loud, aggressive exhaust note for track days or spirited drives.

Featuring dual 2.0" stainless steel mid-pipes with an integrated X-pipe, this cat-back reduces backpressure, smooths exhaust pulses, and improves throttle response. The mid-pipes flow into a 3" axle-back section with a full 3" valved muffler and integrated 3" tips, giving your E46 a bold, aggressive look.

Turner Motorsport reimagined the classic E46 vacuum-valve design, creating a modern valved exhaust that delivers superior durability, precise fitment, and the iconic straight-six tone BMW enthusiasts love.

Part Design:

• Turner In-house designed and engineered using FARO ARM laser scanning technology and SolidWorks 3D CAD modelling for precision fitment.
• T304 Stainless Material in a natural finish - 1.25mm wall thickness, back purged and TIG-welded throughout
• 2.0"-3.0" Stainless Steel Mandrel Bent Tubing
• T304 Stainless Steel 12mm barbed exhaust hangers Tig-Welded in OE locations for precise fitment.​
• Flanges to mate up to your factory downpipes
• Over 20 lb weight reduction from the factory cat-back
• Designed for a smoother flow path and less backpressure

Kit Contents:

• 2.0" Mid-section with integrated x-pipe
• New center exhaust brace
• 3.0" Valved muffler with integrated tips
• Valve controller with installation kit and 2 key fob controllers
• New downpipe hardware to replace your seized exhaust studs
• Gaskets, clamps and hardware for installation

Full installation Instructions can be found in the installation tab above.