Unleash the full potential of your BMW M3/M4 G8X (S58) with the CRT Performance Stage 2 Power Package – a complete performance system engineered for maximum power, razor-sharp throttle response, and an aggressive, race-inspired sound.
This kit combines three precision-tuned components that together deliver an optimized flow path from intake to exhaust.

Included Components

1. CRT Performance Single Midpipe 4"

2. CRT Downpipe (Sport 200 CPSI or Decat)

3. Ramair Performance High-Flow Air Filters

Together, these upgrades transform your S58 engine, unlocking a deeper, more powerful exhaust tone and preparing your setup perfectly for Stage 2 or Stage 3 tuning.

1. CRT Performance Single Midpipe 4” – Maximum Flow, Pure Sound

• Full 4-inch (101.6 mm) stainless steel construction for unrestricted exhaust flow.

• Dual resonators ensure the perfect balance between race tone and daily comfort – no drone, no harshness.

• Handcrafted from T304 stainless steel for durability and heat resistance.

• Integrated heat shielding for optimal thermal control.

• Plug & Play installation – no welding or modifications required.

• Backed by a 2-year CRT Performance warranty.

2. CRT Downpipe – Maximum Power, Minimum Restriction

Available in two configurations:

• Sport 200 CPSI Catalytic Converters – ideal for those seeking a blend of power and emissions moderation.

• Decat (Catless) Version – for pure performance and track-only use.

Each CRT Downpipe is handcrafted from 304 stainless steel, featuring CNC-machined flanges and TIG-welded seams for perfect fitment and extreme durability.

Key Benefits:

• Noticeable power and torque gains.

• Faster turbo spool and sharper throttle response.

• Precision-engineered for OEM fit and performance.

• Track-tested and road-proven.

3. Ramair Performance Filters – High-Flow Nanofiber Technology

Specially designed for the S58 engine, these high-flow Ramair filters replace restrictive OEM paper filters, allowing the engine to breathe more freely and perform at its peak.

Features:

• Advanced pleated nanofiber filtration medium for superior airflow and protection.

• Direct OEM replacement – no modifications required.

• Washable and reusable (cleaning kit: Ramair CK-003).

• Sharper throttle response and enhanced induction sound.

• Backed by 35 years of Ramair filtration expertise.

Performance Gains

• Increased horsepower and torque.

• Faster turbo spool and throttle response.

• Aggressive, deep exhaust tone.

• Optimized airflow throughout intake and exhaust systems.

• Fully ready for Stage 2 and Stage 3 ECU tunes.

• No compromises in everyday drivability.

Compatibility

• BMW M3 G80 Sedan (2020+)

• BMW M3 G81 Touring (2022+)

• BMW M4 G82 Coupe (2020+)

• BMW M4 G83 Convertible (2020+)