This stainless steel made Alpha Competition, downpipe, in 3.5" / 89mm diameter, fits without modification between the turbo and the front pipe of the M139 engines fitted to the Mercedes A45 / A45S / CLA45 AMG W177 / C118 in order to remove the main catalyst. Manufactured from high quality T304 stainless steel with handmade TIG welds, this downpipe will bring an average gain of 28hp on a stage 1 engine and a particularly aggressive sound. With a high flow structure and thermal insulation to reduce heat radiation by 50%, this downpipe clearly represents the best value for money on the market!
-
Direct mounting
100% T304 stainless steel
3.5" / 89mm pipework
Specific thermal insulation
Measured gain on stage 1: 28hp
Aggressive sound
Handmade TIG welds
Assembly kit included
Lifetime warranty
- ECU calibration is mandatory -
| Brand | Model | Type | Version |
|---|---|---|---|
| Mercedes-Benz | A Class | W177 - 18-... | 45 AMG - 387 / 421 |
| Mercedes-Benz | CLA | C118 - 18-... | 45AMG - 387 / 421 |
No reviews yet
*Write your comment here
This stainless steel made Alpha Competition, downpipe, in 3.5" / 89mm diameter, fits without modification between the turbo and the front pipe of the M139 engines fitted to the Mercedes A45 / A45S / CLA45 AMG W177 / C118 in order to remove the main catalyst. Manufactured from high quality T304 stainless steel with handmade TIG welds, this downpipe will bring an average gain of 28hp on a stage 1 engine and a particularly aggressive sound. With a high flow structure and thermal insulation to reduce heat radiation by 50%, this downpipe clearly represents the best value for money on the market!
-
Direct mounting
100% T304 stainless steel
3.5" / 89mm pipework
Specific thermal insulation
Measured gain on stage 1: 28hp
Aggressive sound
Handmade TIG welds
Assembly kit included
Lifetime warranty
- ECU calibration is mandatory -
| Brand | Model | Type | Version |
|---|---|---|---|
| Mercedes-Benz | A Class | W177 - 18-... | 45 AMG - 387 / 421 |
| Mercedes-Benz | CLA | C118 - 18-... | 45AMG - 387 / 421 |
- Further information -
Our technical specifications and compatibilities refer to the standard equipment of the vehicles mentioned, in case of doubt about the compatibility of a product, please contact our customer service to answer your questions.
Content protected by copyright © 2026 - All rights reserved
Alpha Competition products are inspected and certified as compliant before shipping. This certification is complementary to the manufacturer's warranty covering manufacturing or material defects for one year on most products in the range. Intercoolers and exhausts have a non-transferable lifetime warranty, but do not cover aesthetic defects that may appear over time. The replacement or repair of the products will depend on the decision of the manufacturer, who will be entitled to request proof or return for expertise of the items concerned. Return costs and third-party costs are not covered by the Alpha Competition warranty.
Mercedes A35 / A45 AMG W177 -15mm Eibach Pro-Kit Lowering Springs
Mercedes A45 AMG W177 / CLA 45 AMG C118 Armaspeed carbon fiber air intake Kit
Eventuri carbon fiber dynamic induction kit for Mercedes...
Okada Projects Plasma Ignition Coils for Mercedes A45 AMG and CLA 45 AMG W176 / W177
No reviews yet
*Write your comment here
