BMW Intake Parts for BMW E90 M3 S65 4.0L

Over 13 CFM more airflow than factory intake plenum! Beautiful Carbon Fiber construction with a roaring induction sound!

At Turner Motorsport, all our Carbon Fiber Intake Systems are top-of-the-line custom-engineered products that we developed in house. Our engineers took it upon themselves to design a prettier, cost effective Carbon Fiber Intake Plenum for S65 owners to compliment our E9x Carbon Fiber Intake System while retaining OEM features. Our S65 Carbon Intake Plenum is no different. Our Carbon Fiber Intakes start with a 3D scan of the factory intake and engine bay. Our Engineers use these 3D images of the chassis to design the intake plenum in SolidWorks modeling software. Using a Flow Bench, the Intake Plenum is then airflow tested against the factory intake, to ensure optimal airflow improvement against stock. The final product is a beautiful and functional Carbon Fiber Intake Plenum, CAD designed for perfect integration with the OEM inlet ducting and stock mounting locations. Our Carbon fiber Intake trumpets flow an average of 13 CFM over the stock BMW intake.

Our E9X M3 S65 Carbon Fiber Intake Plenum is made from 100% high grade prepreg 2x2 twill weave carbon including the internal trumpets, this plenum replaces the OEM plastic plenum allowing the naturally aspirated BMW V8 engine to generate more inductions sounds taking the driving experience of the M3 to a whole new level. The raw V8 rumble gives the M3 an almost CSL like sound and is truly an intoxicating experience. We went through several iterations using different carbon thicknesses to fine tune the sound and the resulting plenum generates an almost unbelievable induction volume and tone.

Our Carbon Fiber Intake Plenum can be used with the OEM airbox or any aftermarket intake system. Paired with our E9X M3 intake system, you're sure to upgrade the look and sound of your S65 engine.

Design Features and Benefits:

CAD designed Intake System for perfect integration with the OEM connections and stock mounting locations.
Carbon intake is manufactured using 2X2 twill weave carbon fiber for a great look in the engine bay.
Plenum is protected by a gloss finish clear coat for UV protection.
Uses OE intake temp sensor and hose locations
Provides same fitment as OE intake
Performance:

Carbon fiber Intake trumpets flow an average of 13 CFM over the stock BMW intake.
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The factory plastic gears in BMW S65 and S85 throttle body actuators are notorious for premature wear due to mechanical stress, engine vibration, and heat cycling. Over time, this wear leads to excessive play, throttle response issues, and eventual failure. This can cause DME fault codes, limp mode, and DSC malfunctions. While replacing both throttle actuators is costly, even new OEM units will eventually suffer the same fate.

Thankfully, ECS has developed the ultimate solution for E9X M3, E60 M5, and E63/64 M6 owners! These Upgraded Throttle Body Actuator Gears are constructed of Teflon-reinforced nylon, significantly reducing friction and gear tooth wear for long-term reliability. Each gear comes pre-installed on a 4140 steel shaft, strengthening the assembly and ensuring a hassle-free installation. With this cost-effective and durable fix, you can eliminate throttle actuator failures for good!

Features & Benefits:

Upgraded Teflon-reinforced nylon gears – Superior to factory plastic-on-plastic gears, reducing wear and extending lifespan. Pre-installed 4140 steel shafts – Increases durability and simplifies installation. Prevents common actuator failures – Resolves worn gear issues that cause CELs, limp mode, and DSC/DME errors. Cost-effective alternative to full actuator replacement – Saves hundreds in parts and labor. Factory-like fitment – Engineered for precise compatibility and long-term reliability. Built to withstand heat and mechanical stress – Ensures consistent throttle performance and extended service life.