Milltek High-Flow Sports Cat & OPF Delete for A45S W177 / CLA45S C118

Milltek High-Flow Sports Cat & OPF Delete for A45S W177 / CLA45S C118

Let's be honest, your A45S or CLA45S is the very pinnacle of the 2.0L turbo world, an absolute engineering marvel. But from the factory, its potential is heavily suppressed. The combination of a highly restrictive catalytic converter and the Otto Particulate Filter (OPF) system strangles the M139 engine, muting its sound, dulling throttle response, and leaving a huge amount of power on the table.

For the owner who wants a massive performance gain without the raw, unrefined noise of a full decat, this Milltek Sport High-Flow Downpipe is the ultimate solution.

This single, precision-engineered component replaces both factory restrictions. It features a premium 200-cell HJS high-flow sports catalyst and a full OPF/GPF delete pipe. By replacing the dense factory units with this large-bore, 3.15-inch (80mm) system, you dramatically reduce back-pressure. This allows the turbo to spool faster, work more efficiently, and unlock the savage performance your AMG was built for.

Crafted from high-grade T304L aircraft-grade stainless steel, this is the essential, must-have component for any serious Stage 2 tune, offering the perfect balance of power, sound, and refinement.

Key Features & Benefits:

• Unlocks Massive Stage 2 Performance: This downpipe is the essential key to unlocking a huge increase in horsepower and torque when combined with our Stage 2 ECU remap.
• Aggressive, Refined Exhaust Note: It completely transforms your exhaust note, delivering a much deeper, more aggressive, and sportier sound with enhanced pops and crackles, but without the harsh, untamed volume of a full decat.
• Faster Turbo Spool: By removing the two main restrictions, the turbo spools faster and more efficiently. This results in a much sharper, more immediate, and savage throttle response.
• Premium Construction: Manufactured from high-quality 3.15-inch T304L aircraft-grade stainless steel for maximum durability against high temperatures.

Fitment:

• Mercedes-AMG A45S (W177 Hatch) | 2019+
• Mercedes-AMG CLA45S (C118 Coupé) | 2019+

CRITICAL INFORMATION:

• A Stage 2 ECU remap is ESSENTIAL after installation. This is required to optimise performance, manage the new engine parameters, and prevent any engine management lights (CEL) from appearing.
• This product is for vehicles without the additional temperature sensor in the downpipe. Please check your vehicle before ordering.
• This product removes a factory emissions device (OPF). It is therefore intended for motorsport, track, or off-road use only.