Upgrade your Volkswagen MK8 Golf R or Audi 8Y S3 with the CTS Turbo EVO4 High Flow Catted Downpipe. This downpipe was engineered to improve exhaust flow, reduce backpressure, and unlock additional horsepower and torque.
The factory downpipe is highly restrictive and limits performance, especially on tuned vehicles. This high-flow catted downpipe allows exhaust gases to flow more efficiently while maintaining a catalytic converter for a more refined and street-friendly setup.
Quick Fitment Overview
- Compatible with Volkswagen MK8 Golf R and Audi 8Y S3
- High-flow catted downpipe for improved performance
- Reduces backpressure and improves turbo response
- Direct-fit installation using factory mounting points
Product Description
The CTS Turbo EVO4 High Flow Catted Downpipe features a 3.5" cast stainless steel flange paired with mandrel-bent 3" stainless steel tubing to maximize exhaust flow and durability.
Equipped with a high-flow catalytic converter, this system significantly reduces exhaust restriction compared to the factory unit, allowing your engine to breathe more efficiently while maintaining a more refined setup than catless alternatives.
This design helps reduce turbo lag and improve throttle response, resulting in noticeable gains in horsepower and torque especially when paired with proper ECU tuning.
Precision engineered for the MQB EVO4 AWD platform, this downpipe installs using factory mounting locations and includes a removable reducer for compatibility with both stock and aftermarket exhaust systems.
Key Features and Benefits
- 3.5" cast stainless steel downpipe flange
- Mandrel-bent 3" stainless steel tubing
- High-flow catalytic converter for improved exhaust flow
- Reduces backpressure and turbo lag
- Improves horsepower and torque, especially on tuned vehicles
- 100% TIG-welded construction for durability
- Factory mounting locations for proper fitment
- Includes removable reducer for exhaust compatibility
- Enhanced exhaust sound without excessive drone
Vehicle Compatibility
- Audi 8Y/8Y.2 S3 (2022+)
- Volkswagen MK8/MK8.5 Golf R (2022+)
Installation and Notes
- Professional installation recommended
- Stage 2 ECU tuning required to prevent check engine light
- Some vehicles may have tamper-proof downpipe hangers that require replacement
- Inspect exhaust connections and ensure proper sealing during installation
Note: Not compatible with OPF/GPF-equipped vehicles.
Most 2022 and newer vehicles are equipped with updated “tamper-proof” downpipe hangers, which can make removing the factory rubber hanger more difficult. To simplify installation, we recommend sourcing an earlier-style hanger (Part Number: 1K0253144AE) from your preferred OEM parts supplier.
Installing this product may trigger a Check Engine Light (CEL). Proper engine tuning software is required to address this. Always confirm compatibility and requirements with your tuner prior to installation.
Recommended Upgrades
- High-flow air intake
- Performance intercooler
- Turbo inlet upgrade
- Catback exhaust
- ECU tuning
Frequently Asked Questions
Q: What is the difference between a catted and catless downpipe?
A: A catted downpipe includes a high-flow catalytic converter, offering improved performance while maintaining a more refined exhaust setup compared to a catless system.
Q: Does this downpipe require tuning?
A: Yes. Stage 2 ECU tuning is required to avoid a check engine light.
Q: Will this increase exhaust sound?
A: Yes. It produces a more aggressive exhaust tone while remaining quieter than a catless downpipe.
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