vtivtec170 Posted October 23, 2011 Share Posted October 23, 2011 im after a 4 into 1 manifold, preferably cheap even off ebaybut, i remember seeing that some you need to get an adjustable de-cat to use them as flanges dont line up perfectly with the cat.can anyone post a link to on that is direct fit onto standard cat as i want to keep cat for now and will fit bore of cat properly too.thanks in advance Link to comment Share on other sites More sharing options...
james Posted October 23, 2011 Share Posted October 23, 2011 dont think you will get a 4-1 to fit on to original cat, you ither need to mod original cat or fit an adjustable one Link to comment Share on other sites More sharing options...
vtivtec170 Posted October 24, 2011 Author Share Posted October 24, 2011 looking at these 2. the first one says 2 inch collector, i thought standard pipe from cat back was 2+1/4 inch so would this manifold restrict it?http://www.ebay.co.uk/itm/120624378810? ... 1423.l2649http://www.ebay.co.uk/itm/140467871839? ... 1423.l2649 Link to comment Share on other sites More sharing options...
noodels Posted October 24, 2011 Share Posted October 24, 2011 standard they are 1 3/4 collector pipe IDthink you may want bigger for a 4-1 my 4-2-1 is great with 2 inchmy 2 inchis classed as 2.25 easy !! Link to comment Share on other sites More sharing options...
simpo Posted October 24, 2011 Share Posted October 24, 2011 2in collector will be fine. but none of those will fit unless you get adjustable de-cat or mod the mani. Link to comment Share on other sites More sharing options...
james Posted October 24, 2011 Share Posted October 24, 2011 2in collector will be fine. but none of those will fit unless you get adjustable de-cat or mod the mani.x2 Link to comment Share on other sites More sharing options...
KiNK43 Posted October 24, 2011 Share Posted October 24, 2011 the flange is usually a bit off, made for eks and integras etc, so yeah adjustable decat needed unless you know a good welder? Link to comment Share on other sites More sharing options...
vtivtec170 Posted October 24, 2011 Author Share Posted October 24, 2011 i cant find a 2 inch adjustable de-cat. just a 2 inch all welded up or a 2.5 inch adjustable de-cat.will a 2.5 adjustable fit with that manifold without modding?basically i want a 4-1 manifold to fit an mc2 DIRECT bolt on with or without adjustable decat for £200 tops.NO modding needed as i dont want to rip the old one off and have to stick it back on instead of bodging parts together Link to comment Share on other sites More sharing options...
noodels Posted October 24, 2011 Share Posted October 24, 2011 try TEGIWA they will help you out £50 ish they do both on request Link to comment Share on other sites More sharing options...
vtivtec170 Posted October 25, 2011 Author Share Posted October 25, 2011 ordered a 4-1 with 2 inch collector and 2 inch adjustable de-cat. Whats the best way of un doing the manifold head bolts on a 115k engine without them breaking? Are they common to break? Was thinking of spraying wd40 on a couple of times a day for a few days before removing and maybe get a breaker bar. Link to comment Share on other sites More sharing options...
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