As said previously if you use the black top you'll need the cat set up ALL the time as you need it for the MOT every year, and if you get pulled for a roadside check, it's not just for passing the IVA!
Unless you use something from one of the major aftermarket engine management systems, like emerald, then you'll not have a tune that will work with a catalyst as the engine management needs to update (adapt) as you drive. Megasquirt can't do this so it's not suited to a cat system.
There are loads of pre '95 silvertops going pretty cheap so it would cheaper than the cat set up just to go and get a silver top - from £50 at most salvage yards and Ebay.
BV.
Last edited by Big Vern : 1st March 2010 at 01:27 PM.
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