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With the availability of the various down pipes, to me it doesn't make sense to go through the process or removing the precats which needs to be done to gut them properly. I guess what I am saying is if you are going to remove the precats to gut them, it makes more sense to go ahead and replace them with downpipes which will net more gains than the gutted precats ever will. If you decide you would rather do the gutted precats, I have a set of stock precats laying beside my garage that you can have. You could gut them prior to removing yours to save some time. Since your car has upgraded turbos, the prior owner may have already gutted the precats, I would pull the passenger side 02 sensor to verify prior to removing the precats. Tim
'91 TT
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