Do you mean swap the exhaust from one car to another? Because that's been possible for quite a while now.
Originally posted by SnoopDenver
As Requested. Note there is more that can be done to the save to increase it even higher. This is just as far as I went.
[ATTACH=CONFIG]22635[/ATTACH]
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Now you take the last 2 bytes of the codes in the area of 0000E8C0 and 0000E8F0 and turn them to FF FF. That multiplies the effect of the installed part. Then you add your FF value in the power multiplier offset and you will be well into the millions of BHP.
You swap those two offsets for the exhaust from one car to another and you've done the transfer.