Doorbusters BMW Exhaust Parts, Mufflers & Catalytic Converters for BMW 4 Series F32 (2014+)

Looking to upgrade your F3X 335? Two of the best starting points are the intake and exhaust. With this limited-time Doorbusters deal, you can get your 335 sounding great and making more power with the included Titanium Valved Catback Exhaust & N55 Stepped Intercooler!

335 TITANIUM VALVED CATBACK EXHAUST

Increase flow, turn up the volume, and shed some weight for the track. These exhaust components are strikingly good looking with beautiful welded pie cut construction and offer weight savings of over 55%. You can drop more than half the weight of your factory exhaust and give your car the aggressive sound it should have came optioned with from the factory. 

We set out to amplify the F30/F32 with a proper exhaust system. To accomplish this goal, our engineers increased flow, reduced weight by 27lbs, and deliver an exhaust system that captures the full unrestricted sound of the turbo inline-6 N55 engine. The increase in flow is gained from single free flowing 3.0" titanium exhaust pipes that feed into the best designed muffler on the market. Our Turner muffler is specifically designed with flow in mind to ensure that even with the exhaust valves closed, the muffler flows and sounds better than the stock muffler. Weight reduction is achieved by replacing the factory piping with lightweight Ti22 titanium and a full titanium muffler for the most weight advantage possible. The best part of the full titanium exhaust is the capability to control just how aggressive you want to your exhaust to sound, far beyond the point that the factory exhaust is able to perform. All of this plus the direct fitment and straight forward installation leads to our Turner Titanium exhaust being the clear answer in your mission to find the best exhaust for your N55 powered F30.

Part Design:

• In-house designed and engineered using FARO ARM laser scanning technology and SolidWorks 3D CAD modeling for precision fitment.
• Ultra-lightweight, Gr2 Titanium Alloy Material in a natural finish - 1mm wall thickness, back purged and TIG-welded throughout
• 3.0"OD tubing full system featuring pie-cut bend sections
• Weight savings over the OEM exhaust system:
  • OEM Downpipe-back (without tips): 48 lbs
  • Turner Titanium Downpipe-back (without tips): 21 lbs 
• 27 lb weight reduction!
• Titanium 10mm barbed exhaust hangers Tig-Welded in OE locations for precise fitment.
• Strategically placed slip joints provide the most adjustability to obtain perfect fitment
• Lightweight Gr2 Titanium Valved Muffler Optimized for superior flow over OEM

Kit Contents:

• Titanium Valved Muffler
• Valve Adapter Harness
• 3" Titanium Midpipe Sections
• 3.5" Turner Exhaust Tips

Installation:

-Click HERE for Installation Instructions-

PERFORMANCE N55 STEPPED INTERCOOLER

Engines make more power when you're able to move as much air and fuel as possible through them. However, air density is just as important as air volume. Cooler air is denser air, so in addition to keeping your engine cool, it's important to make sure that your intake charge is as cool as possible. Turner Motorsport's upgraded intercooler works to reduce air temperatures with a bare minimum of pressure drop. Less pressure drop means less restriction, and a turbocharger that doesn't have to work as hard. This results not only in a longer service life for your turbocharger, but a substantial increase in performance as well.

The stepped design increases volume and surface are in a limited space by adding an additional smaller core at the top of the intercooler. Both cross sectional area and frontal surface area are increased by a whopping 56%, with a design that still weighs under 20 pounds. On the stock intercooler, the temperature differential between the inlet and outlet sides of the intercooler represented a 95 degree drop. With the Turner Motorsport intercooler, that drop was increased to a chilling 140 degrees. The dyno results don't lie: as a bolt-in upgrade, expect gains of 18 wheel horsepower and 10 lb/ft of torque. With a tune and supporting modifications, further gains are possible, up to 36 horsepower and 28 lb/ft of torque.

This cast aluminum intercooler features an attractive, easy to clean matte black finish, with etched Turner logos on the front and bottom. If you're looking for the ultimate cooling system upgrade for your turbo BMW, look no further.

• Cast aluminum construction
• Bar and plate design
• 56% increase in frontal surface area & cross sectional area
• Decrease in temperature of 45 degrees from inlet side to outlet side (95 degree drop stock on outlet side vs. 140 degree drop on Turner outlet side)
• Significantly less restriction (pressure drop of consistently 0.75 psi vs. 1.5-2.5 psi stock)
• +18HP/10TQ (+36HP/28TQ with tune and supporting mods)
• Weighs under 20 lbs.
• Overall size: 520mm wide, 210mm tall
• Mounting hardware inlcuded

Upgrade to the following OE Intercoolers: 17517600531, 17517600530, 17517618809

Release the naturally amazing performance and sound of your B58 powered BMW. Compliment your new exhaust with a charge pipe upgrade for improved reliability and further performance upgrades.

B58 Performance Valved Catback Exhaust - F30, F32, F33, F36:

Still have the factory exhaust fitted to your B58? You don't know what your missing. Free up lost performance with a new full cat-back exhaust complete with factory valve control!

The B58 engine earned the badge "Worlds 10 Best Engines" four times as of 2023. In 2016 the single turbo straight six found its way to the leaderboards for the first time and followed up in 2017, 2019, and 2020 staying on the charts as one of the best engines in the WORLD.

Our new cat-back exhaust is designed to take out restrictions, maximize flow and give your B58 a signature exhaust note that will excite you on every drive. From the factory your vehicle comes equipped with a combination of three mufflers and resonators that do a great job of silencing the exhaust and restricting flow. There is a center muffler(one restriction), rear section resonator(two restrictions) and a bulky muffler(three restrictions!). With all of those stop gates how do you expect to get the maximum performance out of your vehicle, you simply cannot do so. Lucky for our in-house engineers you no longer have to deal with the quiet and limiting factory exhaust.

To create a cat-back exhaust for this incredible engine the changes happen right after the downpipe. We replaced the factory oval pipe with our full 3.0" T304 stainless steel piping. The true 3.0" exhaust makes its way through the center and rear of the car without the center muffler or resonator to keep flow to a maximum! With smooth mandrel bent transitions our exhaust passes perfectly under the rear subframe for a factory equivalent fit. Positioned in the rear of the car is our signature B58 muffler with beautiful inlet and outlet piping that creates the perfect exhaust tuning. Featuring relief cut slip joints and fabricated sheet metal brackets the exhaust can be fully adjusted and mounted seamlessly in the factory locations. Dual 4.0" exhaust tips are optioned to fill out the open space in the rear diffuser and complete the rear profile of the vehicle.

Part Design:

Turner In-house designed and engineered using FARO ARM laser scanning technology and SolidWorks 3D CAD modeling for precision fitment.
T304 Stainless Material in a natural finish - 1.25mm wall thickness, back purged and TIG-welded throughout
Full 3.0" Stainless Steel Mandrel Bent Tubing
T304 Stainless Steel 12mm barbed exhaust hangers Tig-Welded in OE locations for precise fitment.​
Strategically placed slip joints provide the most adjustability to obtain perfect fitment
Features and Benefits:

Street/Motorsport inspiration
Controlled by factory valves
Compatible with factory and aftermarket downpipes (80mm)
Reduction in back pressure for increased throttle response, TQ and HP
Dual exit with fitted exhaust tips
Kit Contents:

3.0" front exhaust section (direct fitment to the factory downpipe)
Full 3.0" light weight free-flowing middle muffler sections for better sound, performance and weight savings.
Valved Rear muffler
Valve extension harness
Clamps and Hardware for an OEM+ install
Turner Exhaust tips - 3.0" Inlet, 4.0" Outlet
Product Development:

Our F Chassis B58 Valved Cat-back was designed, engineered, tested and quality inspected by our Research and Development team at Turner. Nothing but the highest level of precision and quality through leading-edge product development technology including FARO laser scanning for reverse engineering and quality inspection, SolidWorks 3D CAD modeling, rapid prototyping utilizing our in-house 3D printer and rigorous long term product testing.

B58 Engine Design:

BMW's first mass produced turbo charged engine, the N54 took the world by storm opening a whole can of worms in the car industry and aftermarket community. A new era of motors were created with the new B58 roughly 9 years after the N54 had been tested and pushed to its limits along with its single turbo companion, the N55. In 2015 the modular engine family was created and the B58 was released into the wild to set a new standard in performance and reliability. Turning back to their roots the B58 engine features a closed-deck engine design similar to the N54 that allows a massive increased in boost pressure capacity and heightened compression ratio. Thought the B58 is similar in weight and size to its predecessor, the new modular engine makes considerably more power right off the rip. With the new block design heat management has been upgraded to reduce the affects of heat cycling to slow the rate of cooling and prevent engine components from failing due to rapid cooling. Just like the N55 the B58 comes fitted with dual vanos, valvetronic and a single twin scroll turbo. Just 8 years experience of this motor we can all agree that the B58 looks like it could be the future of motors to come. This tunable engine has been tested up to 1000hp with the stock block and hosts a platform for the community to break into a whole new class of attainable "supercar killers".

Click HERE for Installation Instructions:

Turner Aluminum Charge Pipe - F3x B58:

- Click HERE for Installation Instructions -

The factory B58 charge pipe is made from plastic to reduce weight and manufacturing costs. While this is great for the production line and the sticker price, it doesn't hold up well as the engine ages or in the case of increased power.

Replacing the weak plastic stock part with a solid aluminum one like this will ensure proper functionality under higher levels of boost and eliminate wear caused by the heating and cooling of plastic pipes. You can also safely turn up the boost on your B58 once this kit is installed, and not worry about the problematic factory piece.

Whether you have a stock car and are looking for improved throttle response and peace of mind, or a high boost monster in search of reliability in your big horsepower build, this charge pipe is the solution you’ve been looking for!

Design Features and Benefits:

The upper pipe is constructed from 6063 aluminum for increased durability over the factory plastic charge pipe. Can withstand higher boost pressures while offering OE-like fitment.

Billet CNC throttle body flange for OEM fitment.

Black powder coated for exceptional durability and corrosion resistance.

Lower pipe is constructed of 4-ply reinforced silicone hose and a 6061-T6 black anodized aluminum coupler to retain factory fitment to the turbo.

Silicone provides a smooth transition from turbo outlet to the upper aluminum pipe. The silicone also provides good wear resistance wear the charge pipe is in close contact with the turbo inlet and coolant hoses.