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  1. cat converter problem

    QR25 2.5L Engine
    HEY, A COUPLE OF DAYS AGAON I WAS HEARING THIS WEIRD NOISE COMING FROM MY CAT I THINK AND IT MAKES THIS RATTLE/GRINDING NOICE AROUND 2000 RPM AND DOWN BUT FOR SOME WEIRD REASON THE NOISE WENT AWAY BUT I DO FEEL A LITTLE LOSS IN PERFORMANCE SO I THINK THE CAT IS BAD AND IS CAUSING RESTRICTION TO...
  2. December 2003 Recall

    QR25 2.5L Engine
    hey i have a 2004 ser spec v and i'm hearing this rattle sound its kinda hard to explain and it sounds like it's coming from my catalyic converter on the header so i ordered dc headers for my car to prevent my car from thos particles in the cat getting in my engine but i'm just making sure is...
  3. Header question????

    QR25 2.5L Engine
    hey wta header would be better for an ser specv a 4-2-1 or a 4-1
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