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  1. Astra H
    Hello, I have just installed a sportex performance backbox on my astra 1.9 and when reving past 3k revs there is a horrible whistle comming from somewhere that wasn't there before i installed the back box, can someone please tell me what this is?
  2. N/A Tuning
    Was considering replacing exhaust but nothing too fancy as I won't have the car too long. I have stumbled across the sportex website and wondered if anyone has used them before and their thoughts on them. Don't want nothing too ott or too loud just a nice sweet sound
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