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Milltek 3'' Large Bore Downpipe - SSXVW395

Milltek 3'' Large Bore Downpipe - SSXVW395

Unleash your engine's full potential with the Milltek Large Bore Downpipe With De Cat. Specificall...

Best current price£441.00from Demon Tweeks

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Demon TweeksMilltek 3" Large Bore Downpipe With De Cat
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eBayMilltek 3'' Large Bore Downpipe For VW Golf GTI Inc Clubsport & Seat Leon Cupra
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Product Information

Full details

The Milltek 3'' Large Bore Downpipe with De Cat (SSXVW395) is for performance enthusiasts looking to maximize exhaust flow and unlock significant power gains, especially when combined with Stage 2 remap software. Its key benefit is reducing back pressure for quicker turbo spool and increased engine efficiency. A significant caveat is that it is not legal for use on public roads in the UK manufactured after March 1, 2001, and will cause a vehicle to fail the MOT emissions test. This downpipe replaces the restrictive OE catalytic converter, offering increased power, optimal flow, and sustained peak performance for advanced engine upgrades.

All features

Model Part NumberSSXVW395
BrandMilltek

Extended Product Information

FAQs

Is this downpipe legal for road use?

No, fitting a De Cat or Cat Bypass to a vehicle intended for use on UK roads will cause it to fail the MOT emissions test, rendering it unroadworthy and illegal for road use. This product is for off-road or motorsport use only.

What is the warranty on this product?

Milltek Sport warranties apply for the first purchaser only, with proof of purchase required. The downpipe itself is covered by a lifetime warranty for the original purchaser. High-flow sports catalysts and downpipes specifically have a 2-year / 80,000Km guarantee.

Do I need to remap my ECU after installing this downpipe?

Yes, a remap is generally essential. Replacing the catalytic converter alters exhaust gas readings, and the ECU needs recalibration to avoid error codes and ensure optimal performance and efficiency.

What are the main benefits of installing this downpipe?

The primary benefits are increased power gains, reduced turbo lag due to decreased back pressure, and an optimized exhaust flow rate that allows the engine to perform at its peak potential.

Can this be installed with the stock exhaust system?

While designed to replace the OE catalytic converter, compatibility with the rest of the stock exhaust system should be confirmed. It is often part of a larger performance exhaust upgrade package.

What materials is the downpipe made from?

The downpipe is precision-engineered using superior quality materials to ensure high performance and longevity.

Troubleshooting

Check Engine Light (CEL) / Malfunction Indicator Lamp (MIL) illuminates

This is expected without an ECU remap. The vehicle's ECU needs to be reprogrammed (Stage 2 remap) to compensate for the altered exhaust flow and lambda sensor readings. Consult a professional tuner.

Reduced engine performance or rough idle after installation

Ensure the downpipe is correctly fitted and all connections are sealed tightly. Verify that the ECU has been properly remapped to Stage 2 specifications. A poor remap can cause performance issues.

Exhaust leaks detected

Check that all clamps and V-band connections are securely tightened. Ensure any provided gaskets are correctly installed and in good condition. Professional installation is recommended to prevent leaks.

Pros and Cons

Pros

  • Substantial power gains, particularly with ECU remapping.
  • Improves turbo spool time and overall engine responsiveness.
  • Designed for maximum exhaust flow efficiency.
  • Constructed with high-quality materials for durability.
  • Lifetime warranty for the original purchaser offers long-term value assurance.

Cons

  • Illegal for use on public roads in the UK for vehicles manufactured after March 1, 2001.
  • Will cause a vehicle to fail MOT emissions tests.
  • Requires an ECU remap to function correctly and avoid error codes.
  • May not be compatible with all exhaust systems without modification.
  • Warranty terms and conditions apply, and coverage differs for sports cats/downpipes.

Setup, Compatibility & Care

Setup:

This downpipe is designed as a direct replacement for the original catalytic converter. Installation typically requires removing the existing catalytic converter and fitting the Milltek unit in its place. It is strongly recommended that installation is performed by a qualified mechanic experienced with performance exhaust systems.

Compatibility:

This downpipe (SSXVW395) is specifically designed for certain VW models. Please verify fitment with your vehicle's specifications before purchase. A mandatory ECU remap is required after installation, as the engine control unit will detect changes in exhaust gas flow and lambda sensor readings, potentially leading to engine management fault codes and reduced performance if not recalibrated.

Care:

Due to its location within the exhaust system, minimal direct care is needed. However, regular inspection for any signs of damage, leaks, or corrosion is advised. Ensure all connections are secure during routine vehicle maintenance. The high-quality stainless steel construction offers excellent resistance to corrosion.

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