I have been doing some research on coil-overs for my BadAst project and have found there to be some issues with QA1's and leaking seals right out of the box. Also be aware that QA1 has purchased the Carrera brand name.
I have decided to go with Alston ChassiWorks Vari-Coils. Lots of innovative ideas and, for my application, the package is actually 1 full inch shorter then comparable shocks. Helped out some packaging issues I had...
http://www.cachassisworks.com/Conten...Shock_Vol2.pdf
Mark