SLE Catless Downpipe / Midpipe – Mercedes-Benz M133 (A45 / CLA45 / GLA45 AMG)

The SLE Catless Downpipe / Midpipe is a complete free-flowing exhaust solution for the Mercedes-Benz M133 engine, designed to replace both the factory catalytic converter and the restrictive midpipe section that follows. This upgrade eliminates the two most restrictive parts of the exhaust system, allowing your AMG to breathe freely for maximum power, faster spool, and an aggressive exhaust tone.

By installing this assembly, you’ll experience quicker turbo response, more horsepower and torque, and a sharper throttle feel. On tuned vehicles, expect gains of up to +25–30whp and +35–40wtq, along with reduced turbo lag and a more exhilarating driving experience.

Constructed from 3″ T304 stainless steel, the SLE Catless Downpipe / Midpipe features CNC-machined flanges for a perfect seal, mandrel bends for smooth exhaust flow, and two O2 sensor bungs for factory sensors or block-off plugs. A reinforced OEM-style mounting bracket provides stability and long-term durability, even under extreme conditions.

Product Features

• Complete system: replaces both the downpipe and midpipe section

• Gains up to +25–30whp and +35–40wtq (on tuned vehicles)

• Faster turbo spool and improved throttle response

• Aggressive exhaust tone with a deeper, sportier sound

• 3″ T304 stainless steel construction for strength and corrosion resistance

• CNC-machined flanges for precise, leak-free fitment

• Integrated mounting bracket for secure OEM-style installation

• Two O2 sensor bungs for factory sensors or block-off plugs

Vehicle Fitment

• 2014–2018 Mercedes-Benz A45 AMG (M133)

• 2014–2019 Mercedes-Benz CLA45 AMG (M133)

• 2015–2019 Mercedes-Benz GLA45 AMG (M133)

Important Notes

• Fits 2.0L M133 turbocharged engines only

• ECU tuning is highly recommended to prevent check engine lights and maximize performance

• Compatible with both factory and aftermarket exhaust systems

• Designed for off-road use only