For the price, why GMPP? There are no Solstices under factory warranty.
Also, why pigtails? The plug-and-play connectors are nearly the same price, and you don't have to trust the soldering skills (really, crimping, which is just fine if done correctly, much like soldering) an overworked tech who's trying to get a job done under book hours so that he can compensate for the jobs that take WAY over book hours. Performance Autowerks makes a *phenomenal* tune and has gthe best customer service I've ever encountered in any field.
Shrug. To each their own.
Blue-ish 2006 2.4, Werks stage 1 turbo, Borla cat-back, DDM braces, Spec aluminum flywheel, Spec stage 2 clutch, Werks aluminum radiator, some gauges, RKSport hood, Morimoto FX-Rs, GReddy Profec, Norm's fenders
'07 GXP, Werks Big Wheel K04 and tune, Solo catless downpipe, TCE Wilwood 6 piston front brakes, 4-piston rears , stainless brake lines, slotted/drilled rotors, BC Racing BR coilovers, Performance Autowerks intercooler, DDMWorks CAI, charge pipes and braces, RPM rollbar