BMW M3 M4 M2 Competition HJS Downpipes for OPF Vehicle with Registration!

For current BMW M2 (G87), M3 (G80/G81), and M4 (G82/G83) models equipped with a Gasoline Particulate Filter (OPF/GPF), HJS ECE-approved Downpipes are the gold standard for road-legal performance.

The primary advantage of this specific HJS set is its ECE R103 certification, which grants it “Type Approval” across the EU and Switzerland.

1. The “Registration-Free” Benefit

Unlike many aftermarket modifications, these HJS downpipes (typically Part No. 90822060 for the S58 engine) come with an ECE approval mark.

• No TÜV Entry Required: You do not need to visit a testing station (like TÜV or DEKRA) to have these added to your vehicle documents, provided the rest of your drivetrain is stock.

• Legal Compliance: Because they meet strict Euro 6d emission standards, they are considered a direct legal replacement for the factory catalytic converters.

• Warranty Friendly: Since they carry ECE approval and do not require a ECU remap (no “Check Engine Light”), they are significantly less likely to cause issues with factory warranty claims compared to “catless” or non-approved alternatives.

2. Technical Specifications (G-Series S58 Engine)

3. Why HJS for OPF Vehicles?

On modern BMWs, the OPF system is extremely sensitive to changes in backpressure.

• No CEL (Check Engine Light): HJS uses high-quality precious metal coatings in their 200-cell cats, ensuring that the car’s oxygen sensors (Lambda) stay within factory parameters. You will not get a “Catalyst Efficiency” error.

• Thermal Relief: One of the biggest killers of the S58 turbochargers is heat soak caused by the restrictive factory cats and OPF. These downpipes significantly reduce the temperature at the turbo outlet, prolonging the life of your chargers.

• Plug & Play: The kit is designed to bolt directly to the factory turbo flanges and the factory OPF-back exhaust system.

4. Package Contents (New Original Packaging)

A complete, road-legal set should arrive with:

• 2x HJS Downpipes: Integrated with the high-flow catalytic converters.

• ECE Approval Document: A small booklet or certificate (Keep this in the glovebox just in case of an inspection).

• Integral Insulation: High-performance thermal wrapping pre-installed from the factory to protect the engine bay from radiant heat.

Important Note for 2026: While these downpipes are registration-free for the exhaust/catalyst section, they are only legal if your ECU software is original. If you have a Stage 1 or Stage 2 tune that “deletes” the catalytic monitoring, the ECE approval technically becomes void in many jurisdictions.