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I did a search and found a bit of discussion on the matter, but nothing that really answered my question. Exige S keeps throwing the following code:

P0420 Catalyst System Efficiency Below Threshold


It's equipped with a Larini sport cat and exhaust. I'm assuming the cat is probably the culprit, but is there possibly a way to remedy this or will the cat need to be replaced? (or set back to stock?) :shrug:
 

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Its the larini sport cat, you could try a o2 simulator or defeater, but they range from useless to just better than useless on the 06's.
 
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