Been doing some research and I was wondering if its necessary to get an ecm calibration when you change to a large volume air filter such as a screaming eagle stage one or a heavy brather? This woulb be for an 07 Street Bob. Also would a Vance and Hines fuel pack be all that I would need ?

 

It would be a good idea.

Yes, the V&H fuelpack is one way.... and if you only change the air intake, it would probably suffice. Anything else, like new exhaust pipes, and you'll want a remap or a tuner, which is more convenient that a just a remap by the moco.

 

If you change the air cleaner to a high flow one (SE Stage 1) you are increasing the air volume to an already lean engine condition - so YES, you would need to have some fuel management to richen up the mixture. The V&H FuelPak would be fine if you do not intend to make any engine modifications that would require more complex fuel management. I"ve used the FuelPak and the SE Stage 1 air cleaner and the V&H Straightshot Slipons for over 10,000 miles and everything runs fine.

There are dozens of threads on this forum on this topic. If you use the search tool and look for "fuel management" or "ecm calibration" or "fuelpak" you'll get many hits.