need help

[bronco91]

i want to get one of these for my 1991 ford bronco and was wondering is it easy to install or do i need to make modifications to my computer does it set a new rev limit and top speed or just add power and wat kind of power increases should i expect from both levels

[mikel]

The tunes can do any of the things you mentioned, and there is no need to modify the PCM.
The chip installs easily right in the J3 service port.

Thanks

[bronco91]

the two levels that come pre-set in the chip wat power increases do they give me and do i need a custom program to raise the rev and speed limit