I was told by a friend's dad that my 04 TJ Unlimited was not a 4 inch lift, but instead a 2 inch lift, on the fact that all of my brake lines and such are the stock, as they would need to be re-run for a 4 inch. He said the way my lift works currently is a "plug" that sits on top of my spring, making the car sit higher. he said I would need to buy extension for the brake lines, as well as a 3" "plug" instead, but it would be relatively inexpensive. Is this information correct, and if so where might I be able to find these?