i've never had work myself done at race related, however, i was with my friend jared, and their was something wrong with his idle on his 5.0 and race related didn't have a test kit wiring thing, and since my friend was desperate to get his idle fixed, jared drove around several places to buy the kit for the shop. even though race related gave him money to buy it, time is money, and time is precious. but ne wayz, we ended up finding it after using a shitload of gas....