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I have a 2005 Boxster and just confirmed with Borla that I can install an XR-1 exhaust system. I have reviewed the Tubi, Fabspeed and Borla and though all are good systems I really like the sound of the Borla. All three of these systems eliminate the extra 2 catalytic converters. I have been told all three systems will pass the CA emmissions test however since the two catalytic converters have been removed, I may fail the visual inspection. I am wondering how other California members have dealt with this situation? Anybody out there forced to put on the stock exhaust every two years? I would also like to know if any other Boxster owners with the 2.7L Manual Transmission have installed the Borla XR-1 exhaust. Thanks
 

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If you are concerned with emmissions testing, just hold onto the factory exhaust and bolt it back on for emmissions testing.
 
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