My Cart: 0 item(s)

ENGINEERING THE FUTURE OF PERFORMANCE ™
FOLLOW US:

Secure Checkout

Mercedes-Benz

M133 Downpipe
Purchase M133 Downpipe
  • SKU: 01-133-00902-9

    M133 Downpipe

  • Advertised gains are estimates of HP and Torque “at the engine” calculated from gains as measured on a Dynojet Dynamometer in ideal conditions and typically show the largest possible change.  Actual gains are dependent on the following: Learn More

    Model – Manufacturers use the same engine in multiple model vehicles and often times they are in a different state of tune, for example: 2008 C63 and a 2008 CLK Black Series.  Both have the same engine, but the C63 has 451hp while the CLK63 has 500hp.  Naturally the C63 will show more gains as it starts at a lower level.

    Model Year – Similar to above, as time progresses, Manufacturers tend to slightly increase power output via software from one year to the next or offer “Performance Packages” with increased power.  The engines remain largely unaltered and as a result, final tuned output remains the same, while the gains are lower as the starting point is now higher.

    Fuel – Fuel quality is HIGHLY important with performance vehicles.  Low quality and/or low octane fuel will greatly impact engine output and potentially even engine health.  Top tier brand premium fuels should always be used to achieve the best results possible.

    Drivetrain – All wheel drive has higher drivetrain losses than rear wheel drive.  This results in lower numbers when testing on a chassis dyno.  Wheel/tire size and weight will also impact chassis dyno results

    Weather/Conditions – Temperature, humidity, altitude, and air density all impact engine performance.  Heat, high humidity, and thin air will all work towards reducing engine output

    Engine Health – Higher miles tends to result in increased build up and lower compression which can and will impact engine output.  Properly maintained engines will have better performance than abused or neglected engines.

    Supporting modifications – The highest power levels require supporting modifications.  Depending on the engine, this could mean forged internals, built transmission, upgraded fuel system, 110+ octane race fuel, etc.

  • $999.00

  • Prop 65 warning
    Warning

    This product can expose you to chemicals including carbon black, silica - crystalline, formaldehyde, and lead which are known to the State of California to cause cancer, and lead, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Weistec Horsepower 435
Weistec Torque 515
Manufacturer Weistec
Street legal in all the US States No
Engine Family M133
Stock Horsepower 355
See more
year make model trim engine
2019 Mercedes-Benz GLA45 AMG Base (X156) Turbocharged 2L I4 (M133)
2018 Mercedes-Benz GLA45 AMG Base (X156) Turbocharged 2L I4 (M133)
2017 Mercedes-Benz GLA45 AMG Base (X156) Turbocharged 2L I4 (M133)
2016 Mercedes-Benz GLA45 AMG Base (X156) Turbocharged 2L I4 (M133)
2015 Mercedes-Benz GLA45 AMG Base (X156) Turbocharged 2L I4 (M133)
2014 Mercedes-Benz GLA45 AMG Base (X156) Turbocharged 2L I4 (M133)
See more

[ Expect delivery times of up to 1-2 weeks ] [ Needs ECU Tuning to run properly ]


Turbocharged vehicles love free flowing exhaust. The most restrictive part of the exhaust on the CLA 45, GLA 45 and A 45 cars are the downpipe. The factory downpipe contains a catalytic converter and has a very restrictive cross section where it passes between the engine and the subframe. The Weistec M133 Downpipe for the CLA 45, GLA 45, and A 45 is designed to have the best possible flow without any permanent modification to the engine or chassis and even makes use of the factory exhaust hanger. Countless hours were spent designing and testing the downpipe to ensure OEM fit and finish.

The 3” downpipe routes down under the engine into a slip connection to the midpipe. The midpipe has an integrated flex section and runs between the engine and the subframe. The midpipe mates to the factory or AMG sport catback exhaust.

 

Installation of the Weistec M133 Downpipe results in signifigant horsepower gains at the engine and a more aggressive exhaust note, both with the standard exhaust and the AMG sport exhaust option. If you want to make as much power as possible out of your CLA45, GLA45 or A45, the Weistec M133 Downpipe is a must.

Complete system includes Downpipe, Midpipe, and Hardware.

Key Features:

  • 100% mandrel bent and TIG welded

  • Constructed of low carbon 304 Stainless Steel

  • Easy bolt-on solution

  • Improves exhaust note