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Discussion Starter #1
i was reading on the stillen website about the longtube headers and it said that they eliminate the cats making it illegal. so if i got these how easy would it be to get caught. or how could i make them legal. jus attach cats behind them?

thanks
 

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just put cats in some newly modded b-pipe and everything will be fine.. dont even need the o2 sims either.. my high flow dynatechs passed smog fine twice already..
 

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Discussion Starter #3
alright thanks man. i know ive read this but did you have to do tuning and stuff before you felt the total change of them?
 

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yes the uprev tune unleashes atleast nother 15-20 hp.. and 60hp 80tq below 20mph from removing the drive by wire torque management crud..
 
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