tailgatepro Posted June 23, 2013 Share Posted June 23, 2013 I drive BL5 2.0 GT and plan for going track next month. Think of temporary remove Cat . But I heard BL5 have total of 3 Cat which i thought only 1 Cat. Another question is , if I remove Cat, will there have "engine check" alarm, what happen will the engine check come out? will it switch to Safe mode in our ECU setting? Last question: Should I remove cat for tracking? If hairpin exit is weak after remove Cat, then no point. I not sure on straight road can catch back the same timing compare to stock exhaust? which tried before, my max speed is 170km/h and need to brake for next hairpin..... Link to comment Share on other sites More sharing options...
idiot4hire Posted June 24, 2013 Share Posted June 24, 2013 Leave them alone. Even if its after the sensor it won't add much without out a proper tune Link to comment Share on other sites More sharing options...
zanzabar Posted June 24, 2013 Share Posted June 24, 2013 there are 3, one in the up pipe, and 2 affter the turbo. dont mess with them as you cannot just take them out. if you want the turbo to be safer and to get more power get a catless up pipe and a tune, but otherwise leave them. Link to comment Share on other sites More sharing options...
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