The Alpha Competition decat Downpipe for the BMW 240i G42 and 340i / 440i G2x is manufactured from high-quality mandrel-bent and hand-TIG-welded T304 stainless steel. This Downpipe is a direct bolt-on upgrade for the B58 engine and offers high-quality workmanship. stainless steel heat shields are available as an option to minimise heat transfer into the engine compartment.
Compatible with the BMW 2 Series, 3 Series and 4 Series. Not suitable for the facelifted BMW M240i G42 produced from May 2026 onwards. This newer version features an additional pressure connection in the original exhaust system.
Features
- Direct bolt-on
-
Diameter: 4" / 100mm > 3" / 76mm
- 100% T304 stainless steel
- Optional heat shield
- TIG-welded
- Aggressive tone
- Lifetime guarantee
Technical specifications
- Material: T304 stainless steel
- Diameter: 4" / 100 mm > 3" / 76 mm
- Manufacturing technique: TIG welded, mandrel bent
Contents of the set
- Alpha Competition decat Downpipe
- installation kit
- Installation instructions
Frequently asked questions
Is this Downpipe suitable for the B58 engine?
Yes, this Downpipe is designed as a direct bolt-on upgrade for the B58 engine.
Are there any optional accessories available?
Yes, optional stainless steel heat shields are available to limit heat dispersion.
