Mercedes Benz W177/C118/H247, A45s/CLA45s/GLA45 Stainless Steel Charge Pipe Upgrade

Replace the weakest link in the M139's charge path with this Stainless Steel Charge Pipe Upgrade for the Mercedes-AMG A45 S, CLA45 S and GLA45 - a mandrel-bent stainless pipe with a machined diverter valve housing, supplied complete with the silicone coupler and clamps.

The factory charge pipe on these cars is plastic. It is adequate at standard boost and it is the first thing to let go once the car is tuned, usually splitting at the moulded joint under full load and leaving the engine in limp mode. A stainless pipe removes that failure point entirely.

Beyond reliability, the upgraded pipe runs a smoother internal bore and a larger cross-section than the factory unit, so it holds boost more consistently and recovers faster between shifts.

Manufactured from mandrel-bent stainless steel with precision TIG welding and factory-matched mounting brackets, and supplied complete with the diverter valve housing, silicone coupler and stainless clamps.

Key Features

Replaces the Plastic Factory Pipe

The single most common failure on a tuned M139. A split charge pipe is an instant loss of boost and a limp-mode drive home; stainless does not split.

Mandrel-Bent Stainless Steel

Consistent bore through every bend for smooth, uninterrupted charge flow, and a material that shrugs off both heat and pressure cycling.

Machined Diverter Valve Housing

The factory diverter valve bolts straight into the supplied housing with no adapters and no wiring changes.

Complete Kit Supplied

Charge pipe, diverter valve housing, silicone coupler and stainless steel clamps all included - nothing further to source.

Precision TIG Welded

Clean, strong welds and factory-matched brackets, so the pipe sits exactly where the original did.

Direct Bolt-On Fitment

Uses the factory mounting points and connections. No cutting and no fabrication.

Performance Benefits

Removes the most common failure point on a tuned M139
More consistent boost pressure under load
Faster boost recovery between shifts
Smoother, less restrictive charge flow
Essential supporting hardware for Stage 2 and above

A charge pipe is primarily a reliability and consistency upgrade. It supports the power a tune delivers rather than adding power on its own.

Vehicle Fitment

Mercedes-AMG A45 / A45 S (W177, 2019-2025)
Mercedes-AMG CLA45 / CLA45 S (C118, 2019-2025)
Mercedes-AMG GLA45 / GLA45 S (H247, 2020-2025)

2.0L Turbocharged M139 Engine

This pipe is for the 45-series cars. The A35, CLA35, GLA35 and GLB35 run the M260 and use a different charge pipe.

Please Note

Professional installation is recommended.

An ECU tune is recommended to realise the full benefit of the upgrade.

Why Choose Proven Performance Parts

We specialise in high-performance parts for European vehicles - including Volkswagen GTI & R models, Audi S/RS platforms, and Mercedes-AMG applications. Every product we offer is carefully selected for its quality, fitment, and real-world performance - tested by enthusiasts, for enthusiasts.