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Demon Tweeks£1,872.72Visit shop Milltek 3" HJS Tuning Downpipe With 300 CPSI 103R Sports Cat. EC-Approved
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The Milltek Large Bore Downpipe with Hi-Flow Sports Cat is designed for automotive enthusiasts looking to unlock significant power and responsiveness from their engine through improved exhaust flow. This component is an essential upgrade for those aiming for a Stage 2 remap, offering a robust balance between performance gains and emissions compliance; however, it is important to note that upgrading from the stock catalytic converter will typically require an ECU remap to ensure the engine runs correctly with the new sensor readings.
| Model Part Number | SSXBM1037 |
|---|---|
| Brand | Milltek |
Yes, a remap is typically required as the ECU will receive different readings from the Lambda sensors compared to the stock configuration.
If your vehicle was manufactured after March 1st, 2001, the sports cat must be ECE 103R approved to remain road-legal.
Power gains depend on your specific vehicle and tuning stage, but this downpipe is specifically designed to support the requirements of a Stage 2 remap.
This product is covered by a 2-year or 80,000Km guarantee, whichever comes first.
No, this is a downpipe and hi-flow sports cat upgrade that replaces the section immediately following the turbo/exhaust manifold.
The ECU likely needs a remap to adjust for the high-flow catalyst readings; consult your tuner immediately.
Check all mounting points and bolts to ensure they are torqued to manufacturer specifications and not touching the vehicle chassis.
Ensure the ECU map is correctly configured for the new hardware; an incorrect map can cause the engine to run too rich or too lean.
Installation of the SSXBM1037 requires lifting the vehicle and accessing the underside of the engine bay. Given the sensitivity of the exhaust system and Lambda sensors, professional installation is strongly recommended to ensure proper alignment and seal. After installation, an ECU remap is mandatory to prevent check-engine lights and to ensure the air-fuel ratio remains within safe parameters. For care, periodically inspect the connections and the catalyst substrate for any signs of soot buildup or physical damage. Always verify that your specific vehicle model is compatible with the ECE 103R approval status if your car was manufactured after March 1st, 2001.
