Direct fit standard or custom sports
catalysts (including FiA approved).

Custom Sports Catalysts

Jetex Performance Catalytic Converters are designed to reduce backpressure and increase engine power output through significantly increased exhaust gas flow over OEM and standard aftermarket converters. This is achieved by a using a lower density stainless steel monolith matrix (100, 200 or 300 cells per square inch (cpsi)) than the ceramic substrate (400 or 600cpsi used on OEM or standard aftermarket converters).

The stainless steel monolith withstands extreme vibration and temperatures that can destroy standard ceramic substrates. The result is a more durable and longer lasting converter.

We can offer converters with 100 or 200cpsi, complete units with end cones (or stubs) for welding (or clamping) or component parts for the customer to create their own sports catalyst.

We also have converters to allow for different EU emission standards (Euro 2 to Euro 5).

For road cars we recommend a 200 cell catalyst for emissions compliance.

For race and rally cars we have 100 or 200 cell catalysts and a range of 4" or 5" FiA approved converters.


Mantles for self assembly; 4", 4.5" and 5"

100 or 200cpsi mantles (4", 4.5" and 5") that should be used in conjunction with our cones and/or stubs.

Cones for self assembly

Designed to be welded to 4", 4.5" and 5" mantles.

Connectors for self assembly

To be used in conjunction with 4", 4.5" and 5" cones. Available to fit pipe diameters from 45mm to 76mm (1.75" to 3").

100cpsi FiA Approved Converters for 2.5" and 3" pipework

DMSB and FiA. 4" or 5" versions available. Operate up to 1110 degrees, ideal for petrol sports cars and kit cars. Also available as a high temperature option (up to 1600 degrees) for higher powered engines.

E-marked 4" 200cpsi Converter for 2.5" or 3" pipework

Suitable for performance road vehicles, that require an EC approval.

Non-E-marked 4" and 5" 200cpsi Converters for 2.5" and 3" pipework

Suitable for performance road vehicles.

Oval 200cpsi Catalyst to fit 2", 2.25", 2.5" and 3" pipework

'X and Y' 200 Cell Converters to fit 2", 2.25" and 2.5" pipework

Suitable for BMW and Mercedes applications.

100 and 200cpsi 4" and 5" Diesel Catalysts for 2.5" and 3" pipework

Suitable for diesel applications.

Euro 5 (2009-14) 4" and 5" 200cpsi converters to fit 2.5" and 3" pipework

Suitable for more modern engines from 2009 to 2014. These converters are more likely to pass emissions tests during the MOT.