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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > N54 CATS



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      03-15-2022, 02:33 PM   #1
e92jl
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N54 CATS

so i did the sec-cat delete and sold them , then i noticed white smoke so turbos are gone. so now i want to hide the smoke until i save up for a ST kit , so i want to put the secondary cats back on for now, but i sold mine already so can i put any cats that fit there? or does it have to be the oem boysen 5722.17 ? bc i cant find any cats online to buy
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