I'm currently considering adding in an intercooler but firstly I want to get a hold of a new boost gauge but I'm not sure if it's the electrical or mechanical one I should use ( hunch it's the mech one ) looked around and found some cheap ones but they come without fitting kits and finding the bits and bobs needed isn't my speciallity

so any tips and hints, guys/girls are welcome.
Also I'm stripping my s12 out and considering a harness but yet again with my little experience with the s12 I don't know if the harness will just bolt in without any modifications or not, if anyone has a harness in theres let me know how easy or hard it was. ( just don't want to spend money first then find out I've got to spend more just to get them to fit right. )
Cheers