Enhance your BMW driving experience with the Turner Motorsport E9X 335i (N55) Valved Catback Exhaust. Designed for hearty exhaust notes and improved performance, this exhaust system offers a subtle factory-like sound with closed valves and a menacing growl when opened. Crafted with Mandrel bent dual 2.5” 304SS pipes and a high-flow valved stainless steel muffler, it ensures efficient gas flow.

The kit includes Turner Mid Pipes, a Valved Exhaust, Muffler Valve Controller Kit, and engraved Exhaust Tips. Accuseal slip-fit joints simplify installation, making it a bolt-on replacement for the OE version. The full exhaust system is available as Axle Back, Cat-back, or a full Turbo back system, providing a dual-purpose solution for both your neighbors and your desire for volume.

Key Features:

• Mandrel bent dual 2.5” 304SS pipes with brushed finish
• Turner Engraved Polished exhaust tips
• High flow, valved, stainless steel mufflers
• Accuseal slip-fit joints for easy fitment
• Utilizes factory exhaust hangers

Doorbuster N55 Carbon Intake:

Upgrade your N55 engine with the Turner Carbon Intake, breaking away from common setups. The dual inlet design adds functionality without compromising engine bay aesthetics. Located in the "sweet spot," the second inlet maximizes airflow and lowers intake air temps. The bellmouth velocity stack design reduces turbulence for a satisfying flutter after throttle release. The carbon fiber airbox and intake tube feature a gloss clear coat for UV protection, offering a beautiful OEM+ upgrade.

Turner Carbon Fiber Intakes are CAD-designed, ensuring optimal airflow improvement over stock. The kit includes a Carbon Intake Tube, Full Carbon 2 Piece Airbox, Bellmouth Velocity Stack Cone Filter, Billet Turbo Inlet Adapter, Silicone Coupler, and Hardware for Installation.

Key Benefits:

• Increased flow over the factory intake
• Carbon fiber airbox and intake tube with gloss clear coat
• CAD-Designed for perfect integration
• Custom high-flow air filter
• Smooth interior carbon inlet tube for optimal airflow

Design Features:

Carbon Fiber Intake Tube:

• Smooth interior without corrugations for a streamlined flow path
• Integrated carbon flange for secure mounting
• 2x2 twill weave carbon fiber construction
• Gloss finish clear coat for UV protection
• 4-ply reinforced silicone coupler and 6061-T6 black anodized aluminum flange

Air Box:

• 2X2 twill weave carbon fiber construction
• Gloss finish clear coat for UV resistance
• Mounts in stock location with supplied hardware

Air Filter:

• Conical hi-flow reusable air filter
• 8 ply oiled cotton gauze construction
• Bellmouth (velocity stack) filter flange inlet for reduced turbulence and maximized flow

This system is constructed of 2.50" diameter, mandrel bent, TIG-welded, 304 stainless steel, brushed finish tubing and uses all factory mounting locations for an approximate 1 hour install time. In recent testing, this exhaust system produced 12 horsepower and 11 lbs. x ft. of torque. This race inspired system is 15 lbs. lighter than the factory exhaust system and utilizes race tested and proven 3" carbon fiber quad tips to withstand extreme temperatures and weather conditions.

304 Stainless Steel:
This unique exhaust system uses 2.5" diameter 304 Stainless Steel that is TIG-welded and has a hand brushed finish.

Carbon Fiber Quad Tips:
Race tested and proven, carbon fiber quad tips are used for weight savings and a sporty look.

Dual Mufflers:
The dual mufflers consist of a single in, dual out, free flowing design, giving an aggressive sound at high RPM's, yet maintaining a subtle tone at cruising speeds.

Uses OE Mounting Locations:
This system uses factory mounting locations providing stability and hassle-free installation with no modifications necessary.

Legality:
This part does not require a CARB EO#

This system is constructed of 2.50" diameter, mandrel bent, TIG-welded, 304 stainless steel, brushed finish tubing and uses all factory mounting locations for an approximate 1 hour install time. In recent testing, this exhaust system produced 12 horsepower and 11 lbs. x ft. of torque. This unique system utilizes 3.5" diameter 304 polished laser etched quad tips that fit perfectly in your stock bumper cutouts.

304 Stainless Steel:
This unique exhaust system uses 2.5" diameter 304 stainless steel that is TIG-welded and has a hand brushed finish.

304 Stainless Steel Polished Quad Tips:
3.5" diameter polished tips are used for and aggressive yet sporty look.

Dual Mufflers:
The dual mufflers consist of a single in, dual out, free flowing design, giving an agressive sound at high RPM's, yet maintaining a suttle tone at cruising speeds.

Uses OE Mounting Locations:
This system uses factory mounting locations providing stability and hassle-free installation with no modifications neccessary.

Legality:
This part does not require a CARB EO#

Ensure a perfect seal for your BMW's OEM, VRSF, or aftermarket high flow downpipes with our high-quality Grade 12 installation hardware and gaskets. Each set includes 4 bolts, nuts, washers, and 2 stainless steel gaskets suitable for N54/N55 engines. Designed for years and models specified below, these components guarantee optimal performance and compatibility. Additionally, turbo to downpipe gaskets and clamps are available separately, along with midpipe gaskets for the S55 engine.

• High-quality Grade 12 installation hardware and gaskets
• Ensures a perfect seal for OEM, VRSF, or aftermarket downpipes
• Suitable for N54/N55 engines
• Compatible with specified BMW years and models
• Turbo to downpipe gaskets and clamps available separately

Engineered for vehicles with vacuum-actuated exhaust valves, the ECS Remote Vacuum Exhaust Valve Control Kit puts you in complete command of your exhaust sound. This fully standalone system lets you open or close your valves instantly—no reliance on factory controls, drive modes, or complicated wiring.

At its heart is a self-contained vacuum pump and dedicated control module, operating entirely independent of your vehicle’s electronics. The result is broad compatibility with both OEM and aftermarket exhaust systems, allowing for the freedom to switch between aggressive performance sounds and a refined, quiet tone at the touch of a button.

Kit Includes:

Standalone Vacuum Pump – Delivers consistent vacuum for reliable valve function

Wiring Harness Options – Choose from a reversible cigarette lighter power adapter or a length of wire for custom hardwiring

High-Quality Vacuum Hose – Durable, leak-resistant construction for long-lasting performance

Remote Controllers – Compact fobs for easy operation from inside or outside the vehicle

Features:

Instant open/close control for exhaust valves

Operates completely independent of factory electronics

Universal compatibility with vacuum-actuated valve systems

Ideal for both aftermarket and factory exhaust setups

From stealthy early-morning starts to unleashing your exhaust’s full roar on demand, the ECS Remote Vacuum Exhaust Valve Control Kit gives you total control over your car’s voice—whenever and wherever you want it.

Experience Enhanced Exhaust Sound Control with Vibrant Performance Bottle-Style Resonators

Vibrant Performance introduces their Bottle-Style resonators engineered with an authentic straight-through perforated core enveloped in premium multi-layer sound suppression materials. These resonators adeptly mitigate exhaust noise while maintaining unrestricted exhaust flow. Crafted from high-quality T304 stainless steel, Vibrant Performance offers a range of applications, ensuring a perfect fit for various vehicle models.

Constructed for durability with a tight weave, this heat wrap is designed to maintain proper thermal properties in your vehicles exhaust system. This material was hand selected specifically for it's heat characteristics and flexibility. Fiberglass is rated for 1200 degrees, however, this titanium wrap can withstand 1800 degrees! 

Key Features:

• 2" wide x 1/16" thick
• Durable, tightly woven, 100% fiberglass
• Reduce under hood temperatures
• Protect other engine components
• Protect your hands/arms from burns
• Each roll comes with 5 FREE, 14" long stainless steel zip ties

Embark on your custom exhaust project confidently with the ECS Tuning Universal Exhaust catalog, offering quality and price-friendly options. Crafted from T304 Stainless Steel for corrosion resistance, these items feature premium benefits akin to our In-House Engineered Exhaust Systems. With a 3.0" ID (Slip fit) X 65mm OD (Butt) connections, 1.5mm (.060") wall thickness tubing ensures durability. Length on the 65mm OD side is 2.25" while on the 3.0" ID side is 3.50". Ideal for fabricating your unique exhaust system, these universal parts guarantee top-tier quality and longevity.

Benefits:

• Crafted from T304 Stainless Steel for corrosion resistance
• Features premium benefits akin to In-House Engineered Exhaust Systems
• Durable construction with 1.5mm (.060") wall thickness tubing
• Ideal for fabricating custom exhaust projects
• Ensures top-tier quality and longevity

These N55 downpipes feature larger piping and catalytic converter that are freer-flowing than the original cats for better flow and less backpressure. By removing exhaust restrictions the turbos can spool up faster which makes more boost sooner. With additional tuning, more power is available. There are downpipes that delete the primary cats and can leave the exhaust with a dirty and awful smell. These Wagner downpipes are built with a sport cat to keep the exhaust cleaner.Special software, or stand-alone engine management, will be required to keep emissions fault codes and check engine lights from appearing.

Features:

• 200cpi Catalytic Converter
• 100% perfect fit - CAD designed.
• less thermal load on the turbocharger
• more power by reducing back pressure
• significantly more torque
• Made from 1.4301 (SS304) Stainless Steel

For 2011 models, pick up a Cobb AccessPort programmer to go along with these downpipes. Additional tunes are available that will get the most out of this upgrade. Not only will the Cobb AP increase horsepower and torque but special programming is available to keep fault codes, check engine lights, and limp mode from disrupting your day. It has other features too such as data logging and diagnostic fault code reading and clearing. The Cobb AP is the most sophisticated programming tool available for the 135/335 and no tuning plan should be without one..

Made in the USA.

This product modifies (but does not remove or defeat) emissions equipment. For this reason this product may not be CARB compliant, and therefore not emissions legal in some states. Consult local laws and regulations in your area. For more information on this product, feel free to contact our sales department.

This item fits the following BMWs with the N55 engine:
2011-2013 E82 BMW 135i 135is
2011 E90 BMW 335i 335xi 335i xDrive - Sedan
2011-2013 E92 BMW 335i 335xi 335i xDrive - Coupe
2011-2013 E93 BMW 335i - Convertible
Left Hand Drive ONLY