Best Mods to add to your G8x M3/M4!

Performance Catback Exhaust for pure unrestricted power and sound. This exhaust takes out all of the stop gates and pairs with the S58 for an iconic driving experience.

If you have driven an S58 car, even in stock form it feels like the sky is the limit.(If you haven't driven one, we are not sure why you are even looking into this exhaust)

When your driving an S58 equipped car such as the G80 M3 you can put your foot to the floor and it feels like the car would keep going and going, possibly with no limit. The G80 driving experience is great but there is always room for improvement. if dropping over 40lbs from just your exhaust and the gain in flow alone aren't enough to sell you, no problem. From enhancing the exhaust with smoother flow paths and taking out the bulky and restrictive muffler we saw gains up to 10hp and 14lb of torque on the stock ecu with zero tuning. Now that there are options for plug and play tunes as well as unlocking your ECU for custom tuning there is a much larger upside for power improvements. You will have to find the other restrictions holding you back from more power because it wont be the exhausts fault, this is as free flowing as it gets.

Here at Turner our mission was to amplify the G80/G82 with a proper catback exhaust system. To accomplish this goal, our engineers increased flow, reduced weight by 26lbs, and delivered an exhaust system that captures the full unrestricted sound of the sonorous twin turbo inline-6 S58 engine. The increase in flow was gained from dual 3.0" 304 stainless steel exhaust pipes that feed into straight-through free flowing rear section. We specifically designed this catback with flow in mind to ensure the exhaust would never be a restriction. Weight reduction is achieved by replacing the factory piping with lightweight 304ss for a more-than-modest weight advantage. The best part of the Race Inspired catback is the capability to perform far beyond the point that the factory exhaust. All of this plus the direct fitment and straight forward installation leads to our Turner Race Inspired Catback exhaust being the clear answer in your mission to find the best exhaust for your S58 powered G80 or G82.

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
3.0"OD 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
Weight savings over the OEM exhaust system:
OEM Catback (without tips): 62 lbs
Turner Stainless Race Catback (without tips): 36 LBS!
26 lb weight reduction!
Performance:

Mid range torque and power increase 3600-4200 RPM
Torque gains: +14 ft/lbs @ 3850 RPM
Horsepower gains: +10 HP @ 3850 RPM
Smoother horsepower and torque delivery from 3000-6500 RPM
26 lb weight reduction for faster 0-60 ​
Performance Paired with Turner S58 Intake:

Mid range torque and power increase 3600-4200 RPM
Torque gains: +23 ft/lbs @ 3850 RPM
Horsepower gains: +17 HP @ 3850 RPM
All increases in power and torque were done a stock ECU with no tuning.

Kit Contents:

Dual 3" 304SS Exhaust piping from secondary cats.
X pipe replacing middle muffler sections for better sound, performance and weight savings.
Straight through "Race inspired" rear section
Optional Turner Slant Cut or Straight Cut Exhaust tips - 3.0" Inlet, 4.0" Outlet
Clamps and Hardware for an OEM+ install
Optional Exhaust Pipe Hanger Removal Pliers

Upgrade the exterior styling on your G80/G82 with our In-House designed and engineered ABS Rear Diffuser. Utilizing factory mounting locations and supplied hardware this diffuser is a direct bolt-on upgrade that can be installed directly in place of your factory diffuser. Featuring a deep profile, an aggressive fin design, and extending the entire width of the rear bumper, our exclusive design is sure to turn heads! Our engineers did an absolutely amazing job on this diffuser from the styling to the fit and finish that is guaranteed to stand out in the market.

Pay close attention to the design characteristics of the diffuser. The emphasized outline of the diffuser adds a whole new dimension to the rear bumper bringing out the beautiful body lines of the G80. By adding an aggressive fin design and boxing around the exhaust exits the rear/side view is almost transformed into a whole new sub model that BMW forgot to offer.

Features & Specifications:

Designed to accentuate the G80/G82 body lines
Perfectly houses quad 4.0" exhaust tips for upgraded and factory exhausts
Designed in-house using state of the art 3d laser scanning and CAD technology for precision fitment
Mounts to existing bumper insert mounting locations with supplied hardware
Made from lightweight, vacuum-formed ABS polymer, with UV-stabilized gloss black sheet
Mimics the lower section of the bumper with added character to amplify OEM features
Product Development:

Our Turner Motorsport Rear Diffuser was designed, engineered, tested and quality inspected by our Research and Development team. We strive for 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 modelling, rapid prototyping utilizing our in-house 3D printer, and rigorous long term product testing.

Here at Turner our mission was to amplify the G80/G82 with a proper catback exhaust system. To accomplish this goal, our engineers increased flow and delivered an exhaust system that captures the full unrestricted sound of the sonorous twin turbo inline-6 S58 engine. The increase in flow was gained from smooth flow path dual 3.0" stainless exhaust pipes that feed into one of the best designed mufflers on the market. Our engineers specifically designed the muffler with flow in mind to ensure that even with the exhaust valves closed, our muffler flows better and sounds better than the stock muffler. The best part of our Turner performance catback 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 valved exhaust being the clear answer in your mission to find the best exhaust for your S58 powered G80 or G82.

The G80 took the world by storm by breaking the mold of BMW's standard design language. With the G80 and G82, a whole new generation of M car owners emerged. At first people were hesitant about the larger more distinguished front grilles, but after the shock was gone the true glory of BMW's newest M cars began to shine. The G80 M3 and G82 M4 are incredibly capable cars out of the box and Turner's large range of upgrades means the sky is the limit. Give your G80 or G82 the aggressive exhaust note that you wanted from the factory with Turner Motorsport's G80 G82 Stainless Valved Catback Exhaust.

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
3.0"OD 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
Valved Muffler:
Optimized for superior flow over OEM
T304 Stainless Steel
Utilizes factory valve control
Performance:

Mid range torque and power increase 3600-4200 RPM
Torque gains: +14 ft/lbs @ 3850 RPM
Horsepower gains: +10 HP @ 3850 RPM
Smoother horsepower and torque delivery from 3000-6500 RPM ​
Performance Paired with Turner S58 Intake:

Mid range torque and power increase 3600-4200 RPM
Torque gains: +23 ft/lbs @ 3850 RPM
Horsepower gains: +17 HP @ 3850 RPM
Kit Contents:

Dual 3" Stainless Exhaust piping from secondary cats.
X pipe replacing middle muffler sections for better sound, performance and weight savings.
Valved muffler utilizing oem style exhaust valves
Optional Turner Slant Cut or Straight Cut Exhaust tips - 3.0" Inlet, 4.0" Outlet
Clamps and Hardware for an OEM+ install
Optional Exhaust Pipe Hanger Removal Pliers

When designing the spoiler for the M3, our engineering team sought to offer the most impressive performance-oriented trunk spoiler on the market. Utilizing CAD and laser-scanning technology, this spoiler is designed in-house to flow perfectly with the body lines not only on the trunk lid, but also paying close attention to the roof and the rear bumper. 

Inspired by the design of the high kick trunk found on the E46 M3 CSL, we wanted to replicate this performance aesthetic in a unique manner to perfectly compliment the aggressive factory body lines of the F82 M4. Crafted from high-quality hand laid carbon fiber to achieve it's world class appearance and durability, the Turner Motorsport High Kick will give your M4 aggressive styling to set your vehicle apart from the masses. 

Features:

• Installs with no drilling, cutting, or modification of any kind required
• Pre-installed high strength dual sided tape
• High quality hand laid carbon fiber
• World class appearance and unparalleled durability

At Turner we love the S58 and we love carbon fiber. The answer was clear we need to combine the two and the result is amazing. Our carbon ECU cover looks so great along side of the S58 and can transform the appearance of your engine bay in just minutes. One of the first things you do with a new car is take care of all the simple modifications to get the best out car without taking it apart. Simply remove your factory ECU cover and install the carbon cover in the factory location!

Our Turner S58 Carbon ECU cover starts with mold of the original ECU cover to get the best factory-form fitment possible. The cover is made from hand-laid carbon fiber material with pre-impregnated carbon fiber cloth and epoxy resin and finished in a beautiful gloss clear coat for UV-protection and extra durability. Be sure to check out our other incredible carbon fiber pieces we offers to enhance your G80 M3 or G82 M4.

The factory shifter on manual transmission-equipped BMW G80 M3, G82/G83 M4, and G87 M2 has often been criticized for its long throws, imprecision, and "rubbery" gear selection feeling. While aftermarket shifters are designed to address these issues, many fall short due to limited adjustability and modularity. Our engineers have developed the Double-Adjustable Short Shifter Kit, delivering a precise, customizable, and modular system, perfect for both track and daily-driven cars!

Designed with enthusiasts in mind, this kit offers unparalleled adjustment for both throw length and shifter height, allowing the user to tailor their setup for spirited track sessions or an engaged daily commute. Whether you want to retain the factory shift knob or opt for a rally-style lever for enhanced leverage, our exclusive solution provides ultimate flexibility.

Turner Motorsport's design changes the fulcrum point of the shifter, enabling quicker and more precise shifts. The CNC-machined lower shifter assembly is made from 4140 Chromoly steel with a Melonite coating for exceptional durability. The 6061-T6 aluminum bearing cup features precision machining and Type II anodization, ensuring corrosion resistance and a premium finish. Nylatron® bushings and an encapsulated bearing further enhance durability, reducing wear over time.

Key Features and Benefits

Adjustable throw length reduces shift distances by up to 44%, improving shift times and acceleration. Independently modify shifter height by up to 10mm for optimal ergonomics and driving comfort. Solid, "notchy" gear engagement for a race-inspired feel. Make changes to height or throw length from inside the cabin—no need to remove the shifter assembly. Crafted from premium materials like 4140 Chromoly steel, 6061-T6 aluminum, and Nylatron® NSM for maximum strength and longevity. Options for Every Driver

Standard Lever: Compatible with OEM BMW shift knobs for a factory-inspired feel. Rally Lever (Optional): Provides increased leverage and positions the shifter closer to the steering wheel for faster gear changes, ideal for track use. What’s Included

Shift lever assembly with Nylatron® NSM bushings Shifter cup assembly with 6061-T6 aluminum construction All necessary installation hardware Choice of standard or rally-style lever Take control of your driving experience with the Turner Motorsport Double-Adjustable Short Shifter Kit. Whether you're carving corners or cruising on your commute, this kit transforms your BMW’s shifter feel and precision, delivering an unparalleled level of engagement.