Description
Upgrade your Volkswagen MK8/MK8.5 GTI with the CTS Turbo EVO4 High Flow Catted Downpipe designed to improve exhaust flow, reduce backpressure, and unlock additional horsepower and torque.
The factory downpipe is 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 setup compared to race (catless) options.
Quick Fitment Overview
- Compatible with Volkswagen MK8/MK8.5 GTI
- High-flow catted downpipe for improved performance
- Reduces backpressure and improves turbo response
- Direct-fit installation using factory mounting locations
Product Description
The CTS Turbo EVO4 High Flow Catted Downpipe is constructed from high-quality stainless steel and features a 3.5″ cast downpipe flange paired with mandrel-bent 3″ tubing to maximize exhaust flow.
The integrated high-flow catalytic converter reduces exhaust restriction compared to the factory unit, allowing your engine to breathe more efficiently while maintaining a more street-friendly setup than a catless downpipe.
This design helps reduce turbo lag and improve throttle response, delivering noticeable gains in horsepower and torque especially when paired with ECU tuning.
Precision engineered with factory mounting locations, this downpipe installs cleanly and includes a removable reducer for compatibility with both factory and aftermarket exhaust systems.
Key Features and Benefits
- 3.5″ cast stainless steel downpipe flange
- Mandrel-bent 3″ stainless steel exhaust 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 with reduced drone compared to catless systems
Vehicle Compatibility
- Volkswagen MK8/MK8.5 GTI (2022+)
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.
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
Recommended Upgrades
- High-flow air intake
- Performance intercooler
- Turbo inlet upgrade
- Catback exhaust system
- 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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