Kooks / Catalytic Converters

Kooks 2-1/2" GREEN High-Flow Catalytic Converter - GE-90148

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£528.30 VAT included. Shipping calculated for your destination.

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Prices include VAT. Shipping is charged separately and calculated at checkout for your destination. If no shipping option is shown, contact us for a quote before ordering.

Lead times and urgent orders Check timing before you commit

Estimated lead time: 4–6 weeks. Delivery may be faster depending on stock levels. Contact us before ordering if timing matters.

Check your installation

Check the stated dimensions, connections and installation requirements before ordering. Contact us if you need help choosing the part.

Technical specifications
Specification Details
SKU GE-90148
Catalyst type GREEN
Inlet and outlet 2-1/2" inside diameter (ID)
Body diameter 4" outside diameter (OD)
Body length 4" body length
Overall length 7" overall length
Substrate 400 CPSI (cells per square inch)
Application capacity 375 hp per converter; 750 hp per pair
Forced induction Supported within the application rating
Certification standard U.S. EPA
Warning-light condition Elimination of a check-engine light is not guaranteed

A GREEN catalyst for your 2-1/2" exhaust

Choose the connection size that actually matches your pipework. The GE-90148 gives a custom 2-1/2" exhaust the GREEN catalyst specification, with a 400 CPSI substrate and support for forced induction within its application capacity. It is rated for 375 hp per converter or 750 hp per pair.

SKU: GE-90148

Match the smaller connection without confusing the body size

The inlet and outlet are 2-1/2" inside diameter. The body is 4" outside diameter and 4" long, with 7" overall length. Use the connection measurement for the joints and the body measurements for clearance under the vehicle.

Choose capacity for the complete build

The 375 hp per-converter and 750 hp per-pair ratings describe application capacity, not engine power added by the converter. The GREEN substrate treats exhaust emissions and supports naturally aspirated or forced-induction use within that rating.

Finish the system with the right setup

This converter is certified to U.S. EPA standards and does not guarantee elimination of a check-engine light. The certification is a U.S. standard, rather than a UK-specific approval claim. Plan the sensor position, support and calibration with the fabricator.

Ordering and delivery

Estimated lead time is 4-6 weeks. Delivery may be faster depending on stock levels. Shipping is charged separately.

Technical specifications

Specification Details
SKU GE-90148
Catalyst type GREEN
Inlet and outlet 2-1/2" inside diameter (ID)
Body diameter 4" outside diameter (OD)
Body length 4" body length
Overall length 7" overall length
Substrate 400 CPSI (cells per square inch)
Application capacity 375 hp per converter; 750 hp per pair
Forced induction Supported within the application rating
Certification standard U.S. EPA
Warning-light condition Elimination of a check-engine light is not guaranteed

Frequently asked questions

How does this differ from the 3" GREEN converter?

This version has 2-1/2" inside-diameter connections. The listed body dimensions, substrate and application ratings are the same.

Is 750 hp the single-converter capacity?

No. It is the capacity per pair; one converter is rated for 375 hp.

Will fitting a GREEN catalyst guarantee no warning light?

No. A catalyst alone does not guarantee the absence of a check-engine light.

Delivery, customs and taxes

Know the landed cost before you order

Prices include VAT. Shipping is charged separately and calculated at checkout for your destination. If no shipping option is shown, contact us for a quote before ordering.

Lead times and urgent orders

Check timing before you commit

Estimated lead time: 4–6 weeks. Delivery may be faster depending on stock levels. Contact us before ordering if timing matters.

Kooks 2-1/2" GREEN High-Flow Catalytic Converter - GE-90148
Kooks 2-1/2" GREEN High-Flow Catalytic Converter - GE-90148
Available to Order £528.30