Wagner Tuning BMW F-Series B58 HJS Cat Downpipe Kit
Upgrade the exhaust performance of your BMW B58-powered F-Series with the Wagner Tuning HJS Cat Downpipe Kit. Designed for improved exhaust flow and reduced turbocharger back pressure, this high-performance downpipe delivers increased torque, faster turbo response, and enhanced engine efficiency.
Manufactured from premium SS304 stainless steel, the system features a full 3.5-inch design with a high-quality 300CPSI EU6 HJS catalytic converter with ECE approval for improved performance and emissions compliance.
Compatible with:
BMW M140i
BMW M240i
BMW 340i
BMW 440i
Features:
- 300CPSI EU6 HJS Catalytic Converter
- ECE Approved Catalyst
- Full 3.5-Inch Downpipe Design
- SS304 Stainless Steel Construction
- Reduced Turbocharger Back Pressure
- Improved Exhaust Flow
- Increased Torque & Power
- Reduced Thermal Load on Turbocharger
- Direct OEM Replacement Fitment
- Adapter for Factory Exhaust Included
Benefits:
- Faster Turbo Response
- Improved Engine Performance
- Enhanced Exhaust Efficiency
- Street & Performance Ready
- Improved Reliability Under Load
Note:
ECU tuning or coding may be required depending on vehicle setup and local regulations.

