BMW Catback Exhaust Systems for BMW G82 M4 S58 3.0L

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