You may find it will boost spike on the Newage with the decat.
This can cause detonation on the gear change or if you do a high gear slow pull through the revs i.e foot to the floor at 60-70mph in 4th/5th on motorway to pass a slower vehicle.
If you have a boost gauge keep an eye out for spikes and control your driving accordingly.
If you havn't a gauge then take it easy until checked or mapped (if needed).
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