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The Only Cat-Back Built for the 2025 Mercedes-AMG G63 W465 That Sounds Like It Belongs There
The Akrapovic S-ME/T/13H Evolution Line Cat-Back Exhaust is engineered specifically for the 2025 Mercedes-AMG G63 W465 with OPF/GPF emissions equipment. Full titanium construction delivers a dyno-confirmed gain of 21.5 hp and 25.3 Nm while stripping 9.4 kg from the G63's rear end. Akrapovic S-ME/T/13H preserves the factory exhaust valve system for driver-controlled sound across all drive modes, holds full EC/ECE road approval, and bolts directly to the factory catalytic converters with zero cutting or welding. End tips are sold separately (TP-T/S/24/1) for flexible tip customization. Every S-ME/T/13H is handcrafted and dyno-tested at Akrapovic's facility in Slovenia.
Key Features
- 21.5 hp Power Gain — Dyno-measured at 5,950 rpm on the 4.0L V8 bi-turbo with no ECU remap required.
- 25.3 Nm Torque Increase — Linear improvement across the full RPM band of the W465's twin-turbo V8.
- 9.4 kg Weight Reduction — S-ME/T/13H system weighs approximately 17.1 kg versus the OEM system, a 45 percent reduction.
- Full Titanium Build — High-grade titanium mufflers, link pipes, and tubing resist heat and corrosion across track and trail use.
- OPF/GPF Compatible — Designed specifically for 2025 G63 W465 models equipped with OPF/GPF particulate filters.
- Factory Valve Integration — Connects directly to OEM G63 exhaust valve actuators for Comfort and Sport sound control via existing vehicle electronics.
- EC/ECE Road Approved — Fully homologated for road use with no check engine lights or modifications needed.
- Tips Sold Separately — Compatible with Akrapovic Tail Pipe Set TP-T/S/24/1 for the signature quad-exit look.
Fitment
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2025 | Mercedes-Benz | G63 AMG | AMG G63 (W465 OPF/GPF) |
Specifications
| Detail | Value |
|---|---|
| MPN | S-ME/T/13H |
| UPC | 3831126439972 |
| Brand | Akrapovic |
| System Type | Evolution Line Cat-Back Exhaust |
| Material | Titanium |
| System Weight | ~17.1 kg (37.7 lbs) |
| Weight Savings | 9.4 kg (45%) |
| Inlet Diameter | 70 mm |
| Outlet Diameter | 120 mm |
| Power Gain | +21.5 hp at 5,950 rpm |
| Torque Gain | +25.3 Nm at 5,950 rpm |
| Engine | 4.0L V8 Bi-Turbo (OPF/GPF) |
| Vehicle | 2025 Mercedes-AMG G63 W465 |
| Approval | EC/ECE Homologated |
| Tips Included | No — TP-T/S/24/1 sold separately |
| Box Dimensions | 47.8 x 26.6 x 14.9 inches |
| Country of Origin | Slovenia |
What's Included
- Titanium rear muffler pair with integrated exhaust valves
- Titanium connecting link pipes
- Stainless steel mounting brackets and hangers
- All gaskets, clamps, and hardware for installation
- Akrapovic installation manual
Frequently Asked Questions
Does the Akrapovic S-ME/T/13H fit the 2025 Mercedes-AMG G63 W465 with OPF/GPF?Yes. The S-ME/T/13H is designed and homologated specifically for the 2025 G63 W465 equipped with OPF/GPF particulate filter equipment. It is not compatible with earlier W463 or non-OPF G63 variants.
Are exhaust tips included with the S-ME/T/13H?No. The S-ME/T/13H is the cat-back muffler system only. End tips are sold separately. Akrapovic Tail Pipe Set TP-T/S/24/1 is the recommended companion tip kit for the quad-exit finish.
Will the Akrapovic S-ME/T/13H trigger a check engine light on the G63?No. The S-ME/T/13H is fully plug-and-play with the factory G63 exhaust valve electronics and retains all factory sensor connections, producing no error codes.
How much power does the S-ME/T/13H add to the 2025 G63 W465?Akrapovic's dyno shows a gain of 21.5 hp and 25.3 Nm at 5,950 rpm with no ECU tuning required. Additional gains are possible with an optional ECU remap.
Does the S-ME/T/13H preserve the G63's AMG exhaust valve modes?Yes. The system connects to the factory valve actuators and preserves all OEM sound modes including Comfort and Sport via the G63's existing vehicle electronics.
How much weight does the S-ME/T/13H save over the stock G63 exhaust?The S-ME/T/13H reduces exhaust weight by approximately 9.4 kg (45 percent) compared to the OEM system, improving rear weight distribution and unsprung mass.
Is the Akrapovic S-ME/T/13H legal for road use?Yes. The S-ME/T/13H holds full EC/ECE homologation for road use. Verify local state emissions regulations as CARB compliance varies by jurisdiction.
Does the S-ME/T/13H require ECU tuning on the 2025 G63?No tuning is required. The power and torque gains listed are measured on the stock ECU. An optional remap may yield further improvement but is not necessary for installation.
How loud is the Akrapovic G63 catback with valves open?The S-ME/T/13H produces a deep, authoritative V8 growl with pops on overrun when valves are open in Sport mode. With valves closed in Comfort mode the exhaust tone is refined and suitable for daily driving.
What is the required tip kit part number for the S-ME/T/13H?The compatible Akrapovic tail pipe set is TP-T/S/24/1. These slip-on titanium tips complete the quad-exit appearance and further optimize exhaust flow for the 2025 G63 W465.
Installation Instructions
- Safely raise and support the vehicle on a lift or jack stands. Allow all exhaust components to cool fully before beginning.
- Disconnect the factory exhaust valve actuator wiring harnesses at the rear muffler section.
- Remove the OEM rear muffler pair by unclipping the rubber hangers and loosening the mid-pipe clamp connections.
- Lower and set aside the factory mufflers. Retain all OEM rubber hangers for reuse with the S-ME/T/13H.
- Dry-fit the Akrapovic link pipes to the factory mid-pipe outlets and verify alignment before tightening any fasteners.
- Hang the titanium muffler pair from the OEM rubber hangers and align the inlet connections to the link pipes.
- Leave all clamp connections loose during initial fitment to allow full positional adjustment.
- Reconnect the factory valve actuator wiring to the S-ME/T/13H valve assemblies; connectors are directionally keyed.
- Confirm that all muffler sections and link pipes clear the undercarriage, heat shields, and rear bumper by at least 10 mm on all sides.
- Torque all clamps to Akrapovic specification, then start the engine and inspect every joint for exhaust leaks before installing the optional tip set.
WARNING: This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.
Akrapovic
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