I have a Blitz turbo timer, it comes with a stopwatch, automatic timer ( the car's computer times it for you), manual timer (you time however long you want it) and a electronic boost gauge that is built in and its pretty neat!. I suggest go with Blitz because their turbo timers, you can mount them anywhere in your car, to achieve that custom look! Their disadvantage though is that its a little pricey. You can get one with a harness at Summit Racing for like 160 includ. harness..... Think about it! Alright peace!