Doorbusters BMW Axleback Exhaust for BMW 3 Series E92 (2007-2013)

Turner Motorsport E9X M3 S65 Carbon Intake Plenum

Unlock the full character of BMW’s legendary S65 V8 with Turner’s in-house engineered Carbon Fiber Intake Plenum—designed to enhance airflow, elevate induction sound, and integrate perfectly with OEM components.

Delivering over 13 CFM more airflow than the factory plenum, this upgraded unit is crafted entirely from high-grade prepreg carbon fiber, including the internal trumpets. The result? A stunning visual centerpiece and a dramatic increase in induction roar—an addictive, CSL-like soundtrack that transforms every throttle input.

Engineered by Turner, Built for Enthusiasts

Turner’s development process starts with a full 3D scan of the S65 engine bay. Our engineers refine every contour in SolidWorks before validating performance on a flow bench. The plenum is then produced using a 2x2 twill carbon weave and a UV-protected gloss clear coat for a long-lasting premium finish.

Multiple carbon layups were tested to fine-tune tone and resonance, culminating in an intake plenum that produces unbelievable induction volume and a razor-sharp V8 wail while maintaining factory fitment and sensor compatibility.

Key Features

CAD-designed for seamless integration with factory ducting and mounting points

100% prepreg 2x2 twill carbon fiber construction (including internal trumpets)

Gloss clear-coat finish for UV protection

Retains OEM IAT sensor and hose routing

Compatible with the stock airbox or any aftermarket intake system

Flows an average of 13 CFM more than the OE plenum

Pair it with Turner’s Carbon Fiber Intake System for maximum sound, performance, and engine bay presence.

Turner Motorsport E90/E92 M3 Stainless Steel Valved Axle-Back Exhaust – Brushed Tips

Add aggressive character to your S65 without sacrificing comfort or emissions compliance. The Turner Motorsport Valved Axle-Back Exhaust gives you full control of your M3’s personality—with quiet refinement when the valves are closed and a deep, motorsport-inspired growl at the touch of a button.

Designed specifically for the E90 and E92 M3, this system retains all factory secondary catalysts, making it fully emissions legal—including in California.

Engineered for Sound, Flow, and Easy Fitment

Mandrel-bent dual 2.5" 304 stainless steel piping feeds into high-flow, valved mufflers, all finished in a brushed stainless aesthetic. Using Accuseal slip-fit joints and the factory exhaust hangers, installation is straightforward and entirely bolt-on.

The supplied Turner Valve Controller Kit lets you switch exhaust mode anytime—giving you the best of both worlds: neighbor-friendly quiet on demand, and unmistakable S65 thunder when you want it.

Kit Includes

Turner Valved Axle-Back Exhaust w/ X-pipe section

Turner Adapter Pipes for factory mid-pipes

Turner Muffler Valve Controller Kit

Turner-engraved brushed exhaust tips

Features

Mandrel-bent dual 2.5” 304 stainless steel construction

High-flow, valved stainless steel mufflers

Brushed stainless finish

Turner-engraved straight-cut tips

Accuseal slip-fit joints for easy installation

Direct bolt-on, utilizing factory hangers

Compatible with all four OE catalytic converters