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Discussion Starter · #1 ·
hey guys, i have an sc300 with a 2jzgte engine but no exhaust. i plan on eliminating the precat with an hks or rmm downpipe. will i pass smog with just the main cat in cali? should i go with the stock downpipe with the precat? thanks.
 

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your engine swap won't pass. you need both cats to pass.
 

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