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Decat lamba question

Discussion in 'A3/S3 Forum (8L Chassis)' started by quattro rob, Nov 19, 2009.

  1. quattro rob
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    quattro rob Member

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    thinking of buying a bigger down pipe and decat then a 3" 1 box system for my a3 1.8t, 1 quastion tho... do these car come fitted with a after cat lamba sensor if so wat i do i need to stop the emission light coming on thanks for ur time
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