Apparently my one gas gauge is out so I don't get an accurate measurement. I have 1999 Subaru outback limited.... I saw on advance auto parts online website a unit i think for like 25$ does that sound right? Can someone help me. Thank you. Also my sister has a 2000 Subaru legacy gt. Here spark plugs wires were 28$ and line are like 69$! How to cords that go into the coil at the top are 90degree angle. Couldn't I just use here spark plug brand and same kind instead of paying like 69$!?