Milltek Decat Downpipe & OPF Delete for A45S W177 / CLA45S C118

Milltek Decat Downpipe & OPF Delete for A45S W177 / CLA45S C118

SSXMZ155

Let’s be honest, your A45S is the king of the hyper-hatch world, an absolute marvel of engineering. But from the factory, its voice is a shadow of what it should be. The highly restrictive catalytic converter and Otto Particulate Filter (OPF) system are strangling the 2.0L M139 engine, robbing it of power, dulling its throttle response, and silencing the raw, aggressive soundtrack it’s capable of.

It’s time to uncage the beast. This Milltek Sport Large-Bore Downpipe is the single most effective hardware upgrade to completely transform your A45S.

This single, precision-engineered component is a full 3.15-inch (80mm) decat and OPF/GPF delete solution. It removes both major restrictions in the exhaust system, allowing the turbocharger to spool with lightning speed and the engine to exhale with zero back-pressure. The result is a total, no-compromise transformation in sound, power, and response.

Crafted from high-grade T304L aircraft-grade stainless steel and designed for a perfect, bolt-on fit, this is the essential, must-have key to unlocking true Stage 2 performance.

Key Features & Benefits:

• Transforms the Exhaust Note: This is the upgrade you will feel and hear. It unleashes the raw, untamed, and aggressive soundtrack your A45S was born to have, complete with a dramatic increase in volume, pops, bangs, and crackles.
• Unlocks Stage 2 Performance: This downpipe is the essential component required for any Stage 2 ECU remap, allowing your engine to produce a massive increase in horsepower and torque.
• Faster Turbo Spool: By removing all restrictions, the turbo spools faster and more efficiently, resulting in a much sharper, more immediate, and savage throttle response.
• Premium Construction: Manufactured from high-quality 3.15-inch T304L aircraft-grade stainless steel, ensuring durability and resistance to the highest temperatures.

Fitment:

• Mercedes-AMG A45S (W177 Hatch Only) | 2019+
• Note: Fits vehicles without the additional temperature sensor in the downpipe.

CRITICAL INFORMATION:

• A Stage 2 ECU remap is ESSENTIAL after installation. This is required to optimise performance, adjust for the new airflow, and prevent any engine management lights (CEL) from appearing.
• This product removes both the catalytic converter and the particulate filter. It is therefore intended for motorsport, track, or off-road use only.