There are two catalyser installs on the Toyota-engined Elises which destroy their factory catalysers more than the other motors. One is the 2ZZ Elise SC model. The other is this one - the 2ZR motor!

The factory 2ZR manifold has a different 2-bolt flange compared to the 2ZZ and a different bore downpipe to the catalyser. This downpipe is 60mm diameter. Any larger and you're damaging torque. 

I use the highest spec Euro 5/6 121mm diameter HJS HD directional catalyser on these installs. No problems with emissions tests and you will not have a CEL. 

Only 2bular designs and builds an HJS HD catalyser to fit to the factory manifold.

The gasket cup is TIG-welded to the flange. A unique 2bular feature. Forget about loose flanges and bigger bore downpipe - only 2bular pay attention to these parts.

More catalyser info here - 

http://www.exhaustcompare.com/index.php/comparisons/item/437-catalysers

PLEASE NOTE: I DO NOT SUPPLY THE LAMBDA SENSOR ANY MORE  - TOO MANY FAILURES.

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