A cordierite gasoline GPF (Gasoline Particulate Filter) is a ceramic wall‑flow filter made from cordierite (2MgO·2Al₂O₃·5SiO₂) that is installed in the exhaust system of gasoline direct‑injection (GDI) vehicles. Its primary purpose is to trap and remove particulate matter (soot) from the exhaust stream to meet stringent Euro 6 particle number (PN) limits.

Key Characteristics:

• Material: Cordierite is chosen for its excellent thermal shock resistance, low thermal expansion coefficient, and ability to withstand high continuous operating temperatures (up to ~1200°C).
• Structure: Unlike a flow‑through catalytic converter, a GPF uses a wall‑flow honeycomb design with alternating channels plugged at the ends. This forces exhaust gases to pass through the porous ceramic walls, where soot particles are physically captured.
• Filtration Efficiency: Cordierite GPFs achieve particle filtration rates of over 90%, significantly reducing soot emissions.
• Passive & Active Regeneration: The collected soot is periodically burned off at high temperatures (around 600°C) to restore filter capacity.

Cordierite GPFs are the most common type used in modern GDI vehicles due to their cost‑effectiveness, durability, and excellent filtration performance.

A gasoline GPF operates on the wall‑flow filtration principle combined with catalytic regeneration. Here’s how it works step by step:

Filtration:

• Exhaust gas enters the inlet channels of the honeycomb structure. The ends of these channels are plugged, so the gas is forced to pass through the porous ceramic walls into the adjacent outlet channels.
• During this passage, soot particles (PM) larger than the pore size (typically 10–20 µm) are trapped on the wall surface and within the pores.
• The clean gas then exits through the outlet channels.

Regeneration (Soot Removal):

• Over time, trapped soot builds up and increases exhaust backpressure. The filter must be regenerated to burn off the soot.
• Passive regeneration occurs during normal high‑speed or high‑load driving, when exhaust temperatures rise above 500°C and oxidise the soot in the presence of oxygen (or with the help of a catalytic coating).
• Active regeneration is initiated by the engine control unit (ECU) when the backpressure reaches a threshold. It adjusts the air‑fuel mixture or injects extra fuel to raise exhaust temperatures to ~600°C, enabling complete soot burn‑off.

This cycle of filtration and regeneration allows the GPF to maintain low emissions and optimal engine performance over its lifetime.

The main difference between a coated and an uncoated GPF lies in the presence of a catalytic washcoat on the filter walls. This affects both filtration performance and regeneration capability.

In practice, most OEM GPFs are coated to ensure reliable regeneration and overall emission control, especially under real‑world driving conditions.

A properly functioning gasoline GPF delivers significant emission reductions and performance benefits:

Particulate Matter Reduction:

• Reduces particle number (PN) emissions by 90–95%, bringing gasoline vehicles in line with diesel Euro 6 PN limits.
• Captures particles as small as 10 nm, including the most harmful ultrafine particles.

Gaseous Emission Improvement (coated GPF):

• Additional oxidation of CO and HC by up to 20–30%, supplementing the main TWC.
• Helps maintain low tailpipe emissions throughout the vehicle’s life.

Engine Performance & Durability:

• Minimal impact on fuel consumption and engine power when regenerated properly.
• Protects the downstream catalyst from soot contamination, extending the life of the entire exhaust system.

Real‑World Benefits:

• Reduces soot accumulation in the exhaust, lowering the risk of clogged EGR valves or turbochargers.
• Helps vehicles pass emission inspections and meet legal requirements.

However, effectiveness depends on correct installation, proper engine tuning, and regular maintenance (e.g., avoiding short trips that prevent regeneration).

We offer a 1‑year warranty on our cordierite GPF products from the date of purchase.

What is covered:

• Manufacturing defects in the ceramic substrate, such as cracks, broken walls, or structural failures that occur under normal use.
• Coating integrity for coated GPFs (flaking or detachment of the washcoat).

What is NOT covered:

• Damage caused by improper installation (e.g., over‑torquing, incorrect orientation, or physical impact).
• Engine‑related issues (misfires, excessive oil consumption, or incorrect air‑fuel mixture) that lead to overheating or clogging.
• Fuel contamination (leaded fuel, high‑sulfur fuel, or additives that poison the filter).
• Melting or sintering due to sustained exhaust temperatures above 1200°C.
• Normal wear and tear or soot loading beyond the filter’s capacity.

Claim procedure: To make a warranty claim, please contact our support team with your order number, installation records, and clear photos of the defect. We will review each case individually.

We recommend professional installation and regular maintenance to ensure the GPF operates within its design parameters.

Installing a ceramic GPF requires careful attention to its physical and operational requirements. The following principles should be followed:

Mounting Position:

• The GPF must be placed after the TWC (three‑way catalyst) but before the muffler in the exhaust system. This ensures sufficient exhaust temperature for regeneration and reduces the risk of condensation.
• It should be oriented with the flow direction arrow pointing towards the rear of the vehicle.

Mechanical Support:

• The filter is heavy and brittle; it must be securely supported by brackets or a robust housing to prevent vibration‑induced cracking.
• Use OEM‑specified mounting mats or cushions to absorb thermal expansion and dampen vibration.

Sealing & Connections:

• Ensure exhaust pipe ends are clean and free of debris before fitting.
• Use new gaskets and high‑temperature sealant to avoid leaks.
• Tighten flange bolts to the correct torque (typically 30–45 Nm) in a cross‑pattern to avoid warping.

Electrical & Sensor Considerations:

• If the GPF has an integrated pressure sensor or temperature sensor, ensure they are correctly connected to the ECU.
• For coated GPFs, oxygen sensor placement may need adjustment to maintain correct closed‑loop control.

Post‑Installation Checks:

• Start the engine and check for exhaust leaks.
• Perform a forced regeneration cycle (if equipped) to verify the filter behaves correctly.
• Monitor the ECU for any fault codes related to GPF efficiency or backpressure.

Our shipping and delivery times depend on stock availability:

• If we have stock: We ship within 1–3 business days. Delivery typically takes 12–15 days (including customs clearance and duties).
• If we are out of stock: Production and handling take 15–20 business days, then delivery takes approximately 12–15 days (including customs clearance and duties).

All shipments are sent DDP (Delivered Duty Paid) – this means that all customs clearance fees, import duties, and taxes are already included in the total price you pay. You will not be charged any extra fees upon delivery.

If you need faster delivery, please contact us to arrange expedited shipping via DHL, UPS, or FEDEX (additional charges apply).

We will provide you with a tracking number as soon as your order is dispatched.

You can reach our team directly via WhatsApp or email. We are happy to assist with any questions about products, sizing, orders, or technical support.

We typically respond within 24 hours (Monday–Saturday). Please include your order number or vehicle details for faster assistance.

Our company headquarters is located at:

Building C, Zhongguan Innovation Center, Dongcheng 2nd Road, Pujiang Town, Minhang District, Shanghai, China

We welcome business visits by appointment. Please contact us in advance to arrange a suitable time.