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Mercedes GLA45 AMG: Weistec Performance Upgrades

Mercedes GLA45 AMG: Weistec Performance Upgrades | Image 1

The Redline Speed Worx (RSW) Performance Team has a Mercedes GLA 45 AMG in the Lab today for a complete Weistec Engineering M133 W.2 Power Package Package.

GLA45 AMG Performance Upgrades at RSW New Jersey | Image 2


Turbocharged vehicles love free flowing exhaust. The most restrictive part of the exhaust on the CLA 45 and A 45 cars is 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.

GLA 45 AMG Performance New Jersey | Image 3

The Weistec M133 Downpipe for the CLA 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 as well as prevent any check engine lights.

Wesitec GLA 45 AMG Exhaust Upgrade | Image 4

Right off the turbo, the Weistec downpipe has a 3.5" diameter, perfectly matching the outlet of the turbine housing. The 3.5" pipe routes down under the engine to a flex section. After the flex section the piping tapers to 3" diameter. This section of the pipe uses a V-band connection to mate with midpipe that runs between the engine and the subframe. The midpipe mates to the factory or AMG sport catback exhaust.

CLA 45 AMG Performance Upgrades | Image 5

The upper portion of the Weistec downpipe comes standard with internal Copper Ceramic coating to keep heat inside the piping, maintaining exhaust velocity and reducing engine bay temperatures.

Weistec Engineering Exhaust Upgrades for Mercedes Benz | Image 6Weistec Downpipe Upgrade CLA45 AMG | Image 7

Additional to the Exhaust System is the Weistec M133 Turbo Heat Shield which features 100% stainless steel construction with interlocking side panels to ensure solid fit and finish. Providing function as a heat shield while improving under hood appearance. Testing shows under hood temps at the turbo drop as much as 15 degrees F compared to the original shield.

Some cars will experience a check engine light if Exhaust System is installed without proper ECU tuning. For maximum performance and gains, a Weistec ECU Calibration is highly recommended.

Mercedes Benz 45 AMG Upgrades | Image 8

Complete system includes Downpipe, Midpipe, Heat Shield, and Hardware.


  • 100% mandrel bent and TIG welded
  • Constructed of low carbon 304 Stainless Steel
  • Internally Copper Ceramic Coated**
  • Optional stainless steel heat shield offer the Weistec look and function
  • Easy bolt-on solution
  • Improves exhaust note
  • Increase of 55+ Wheel Horsepower and 115+ Wheel Torque when combined with Weistec M133 ECU Calibration

Interested in Upgrading the Performance of your CLA / GLA 45 AMG? Contact our Experts today!

Weistec Performance Upgrades GLA45 AMG | Image 9


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