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Discussion Starter #1
I have an Astra Mk5 888 (no100) and i have an Scorpion front de-cat and cat back to fit. I was thinking if taking the main cat out aswell but don't know if it will be worth it of not?Will it help performance and torque? Also will it make the smoke more when on full chat?
 

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I'm currently in the same predicament, surprised there's no right and wrong answer as to what set up produces the most power when it comes to exhausts.
 

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Discussion Starter #14
Well i have the scoripian front de-cat pipe and cat back sitting at home now :). Will be fitting it in a couple of week's but still unsure about the main cat?
Just leave it or take it out?:confused:
 
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