hey i just saw this,
http://www.procarparts.com/store-detail.asp?sku=UNXX77%2D8511FTX i dont know if this is right about the filter with 77mm is that the correct size for a normal 3 inch short ram civic pipe? plz help i just need to know forsure b4 i buy, if not is it 70 mm? thx for the help.