[Troyota]

A bigger intercooler may make the turbos spool a bit slower. It will however allow more power to be had in conjunction w/ other modifications. If you are planning on adding a lot more power to your engine then an upgraded intercooler would be a good idea. However, the 1JZ intercooler is better than the 7M intercooler...in fact a lot of 7M owners will switch to the 1JZ intercooler especially when doing a front facing intake manifold moddification. Your 1JZ intercooler should be fine w/ the mods you have done and if you don't plan on making a whole lot more power.