400BHP Posted October 4, 2003 Share Posted October 4, 2003 Has anyone removed the cat and replaced it with a decat pipe? I heard on the grapevine (mid) that the securing bolts were a real shit to remove, is this correct any hints or tips for me? Ta Link to comment Share on other sites More sharing options...
Supra ST Myster Posted October 4, 2003 Share Posted October 4, 2003 which cat, 1st or 2nd cat, as my 2nd cat bolts were easy to get off and mine is a 1993 TT. Link to comment Share on other sites More sharing options...
400BHP Posted October 4, 2003 Author Share Posted October 4, 2003 The cat that attaches to the turbocharger, as in thread title mate.. Link to comment Share on other sites More sharing options...
Supra ST Myster Posted October 4, 2003 Share Posted October 4, 2003 yep realised after i posted my comment! Link to comment Share on other sites More sharing options...
JohnK Posted October 4, 2003 Share Posted October 4, 2003 Got Chris Wilson to do mine, he said he snaped 2 of the studs doing it. Link to comment Share on other sites More sharing options...
Billy Posted October 4, 2003 Share Posted October 4, 2003 Done mine no problem on a ramp bit of a pig to get to makes it a lot simpler if you strip away a couple of bracket type parts that will bocome obvious when you look. i used a socket on a long wobble bar and all went ok but i did talk to chris wilson before i started and he talked me throw how to do it and what tools to use Link to comment Share on other sites More sharing options...
Suprachargedtt Posted October 4, 2003 Share Posted October 4, 2003 how much difference in bhp would you get from de-cat'ing the exhaust? some sites say 20bhp, some say up to 40bhp? Link to comment Share on other sites More sharing options...
Terminator Posted October 5, 2003 Share Posted October 5, 2003 Shearing off studs is the worst that can happen, and unless you have the right tools to get what is left out of the holes you are stuck without a car. Having the right tools is essential. You must have a socket and wobble bar or coupling and long extensions that allow you to get the socket perfectly square on the nuts. These babies are tight and if the socket is off centre, the force required may shear the stud if they are very tight. If you use a wobble bar don’t be tempted to feed the socket on with the bar it not seat perfectly square on the nut. I put the socket on good and square first, by hand and followed up with a short extension, a coupling and long extension. The nuts came off with medium to gentle pressure using a long bar. Giving the nuts and studs a good soaking in WD40 for a while before you attempt to undo them may help. Link to comment Share on other sites More sharing options...
400BHP Posted October 5, 2003 Author Share Posted October 5, 2003 Thanks Guys. Much appreciated. Link to comment Share on other sites More sharing options...
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