The thickest best cooling IC ever made was the Thrasher, not the ZZP. Although theres hard to find nowadays, there the most efficent ever made and the proof is out there. And plus there 2.5"
The ZZP Stage 2 is 2.25" and its 2 aluminum plates
The ZZP Stage 3 is 2.35" (i think, there not a full 2.5") and they have an aluminum top plate, and a plastic bottom plate. There a piece of **** because the plastic bottom plate has a different themo expansion rate and they always crack eventully. Good and careful planning by Zooomer there.
The SSIC, I had one on my car, very unefficent in my opinion. A full sized IC will make the SSIC its *****. I had one on the black car, the small lines, noise ass pump, gay filler T and always heat soaked blower made effency to be desired for. After seeing how my custom Full sized kicked ass, I had to change that setup. All I did with that setup was install an ILGPC (Ron Vogels old core) core w/ 3/4" lines, GM pump, and a Cobalt SS Filler T w/ 5 psi cap... Night and day difference. Now the S/C actully stays cool, just like a GOOD IC should do. There test between the SS and the ILGPC is bull****, in the real world the ILGPC will out perform the SS hands down period.