Mercedes-Benz A45 AMG Catless Downpipe — M133 2.0L Turbo
YPG Motorsport catless downpipe for the Mercedes-AMG A45 (W176) replaces the restrictive factory catalytic converter on the M133 2.0L turbocharged four-cylinder with a mandrel-bent stainless steel pipe. The M133 was the most powerful series-production four-cylinder in the world when it launched — and with the cat removed, the turbo spools faster, throttle response sharpens, and the exhaust note gains a deeper, more aggressive character.
When paired with a Stage 2 ECU calibration, the A45 delivers 420–440 HP and 380–400 lb-ft of torque from the facelift model (381 HP stock). The pre-facelift (360 HP) reaches 400–420 HP. For Stage 3+ builds with turbo upgrades, the downpipe is a mandatory prerequisite — it's the biggest restriction in the factory exhaust path.
Compatibility
- 2013–2019 Mercedes-AMG A45 (W176)
- Pre-facelift (360 HP) and Facelift (381 HP) models
- M133 2.0L Turbocharged 4-cylinder
Key Specifications
- Material: 304 stainless steel
- Construction: TIG welded, mandrel bent
- Fitment: Direct OEM replacement — bolt-on, no fabrication required
- Warranty: Lifetime
What's Included
- 1× stainless steel catless downpipe
- All necessary bolts, gaskets, and clamps
Installation
Professional installation recommended. 30–45 minute installation. A Stage 2 ECU calibration is required to eliminate the CEL and unlock full power. GCC-delivered cars do not include GPF — installation is straightforward. YPG Motorsport offers remote ECU flashing worldwide.
Why YPG Motorsport
Since 2011, YPG Motorsport has been tuning AMG engines across every platform, including M133 builds up to Stage 4 turbo upgrades. Ships worldwide with free delivery. GCC stock available for same-week dispatch.