Turner Motorsport B58 Performance Valved Catback Exhaust

Turner Motorsports 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 time it is installed. From the factory the exhaust comes equipped with a a center muffler, rear section resonator and a bulky muffler. The combination of 3 muffler/resonators do its best to quiet down the B58 and as a side effect, increase backpressure. 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 Turner you no longer have to deal with the quiet and limiting factory exhaust.

If you 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!

To create a cat-back exhaust for this incredible engine the changes happen right after the downpipe. Turner replaced the factory oval pipe with 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 the exhaust passes perfectly under the rear subframe for a factory-like fit. Positioned in the rear of the car is their 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.

Sound clips! Check out our Product Highlight on the ECS Tuning YouTube channel!

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
• Optional Turner Exhaust tips - 3.0" Inlet, 4.0" Outlet