The other reviews cover auto part installation which may be their speciality.  But I used them to install an Interlock device through Instant Interlock. They damaged my ignition and would not remove the device when it was due. They delayed removal until I was charged late fees even though they were not monitoring the device. They denied the damage but would not even look at the device or vehicle. Just said it was \""not possible\"" although my 2 mechanics disagreed. As a result, I have had to spend hundreds of dollars in illegally charged  fees from Instant Interlock. Not to mention the cost of repairing my vehicle which is yet to be determined. \n\nMuch of the rude, disrespectful and dishonest behavior was on the part of Instant Interlock, but the problems with the device itself and the installation were caused by Streetfighter's. And they lied to us about removing it, didn't show as promised and lied about the fees.\n\nDON'T let these guys installl an interlock on your car. And don't use Instant Interlock either.