![The Judge](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_judge.gif)
my friend gave me a new set he had for his old stock LT1...now my car runs like crap. will 8.5 superconductors work wit hthe stock mani's?(heard you need headers)..i dont have a rack to do the passenger side, so what kinda labor costs have any of you seen just for plug wires installed?