Only 12.2? My '06 is at 10.5 at WOT.
Regarding the tune: if you're on Trifecta, you will likely have a great deal of difficulty installing anything else. The tune is locked - meaning, it requires a code before it can be read (or downloaded, if you prefer). I hope that the Trifecta software will let you reinstall the stock tune, which would then let you tune using, say, HP Tuners. But, I've recently dealt with a case where a friend bought a GXP with a Trifecta tune and even GM couldn't re-flash the ECM. Wound up having to get a replacement ECM for his car.
There's no good reason to upgrade injectors if you're already getting a new motor and don't have immediate plans to go with E85. Re-use your current injectors, and ZZP gave you good advice. It's rare that a vendor will be honest and tell you that you don't need a bunch of additional parts. (We're fortunate that most of the kappa-friendly vendors will do so.) The ARP studs are great if you're running crazy boost, or boosting a high-compression engine a bit more than is recommended. I've been running 13psi-15psi on my '06 for a few years now. Studs are easier than bolts, and better at keeping the head from lifting. On an LNF at ~25psi, they're not necessary. (But, they look REALLY cool poking up out of the block.)
Also, there's a really nice video on YouTube of a guy putting an LDK block (with LDK head) in a Solstice, with no trouble fitting. Still not sure why so many think it won't fit. I work with CG a lot, but it'd take a lot of work to make an effect look that terrible.
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
Last edited by raygun; 06-24-2019 at 11:35 PM.