Parts that require a Re-Tune

[Joe@Trick Tuners]

If you change any of the following please let me know so i can reformulate your tune. (to minimize any delays, please let me know a few days before you get the new part).

These are parts that require a custom tune or a retune FOR SURE!!

injectors
Maf
boost
Most CAIs, especially on the 05+ mustangs
Cams

These are parts that probably require a retune. (you may be ok without one)

LT headers (if the car runs funny at all, get a retune!)
Intake manifold
Ported heads
gears (speedo will be off, but no other issues. autos may shift funny)
fuel pumps (on returnless cars only, no tune needed on return style cars)
Throttle body (05+ cars only)

Parts that do not require a tune.

cat back exhaust
tires and wheels (if you make a big change in size, your mph might be off a bit and we can retune for that)
brakes
suspension
throttle body (on pre-05 cars)
Throttle body spacer (waste of $$$)
Plenum

I may have missed a couple things, but i will edit this as i think of other parts.