2013 Dyna Switchback. Bought the bike used. P.O. had installed a VH slip on exhaust and a high flow air cleaner. Bike came with a Fuel pack 3 tuner. Runs excellent.
I was given a complete stock exhaust off another Switchback. I removed the Cat Convertor and am planning on installing the head pipe without the cat.
My question is will I need to use the FP3 again or just leave it alone.
If it doesn't run right I can always put my head pipe with the cat back on.
Thanks for your help.
Yes it will need a re-tune. Bob