Suprescene is again pushing what he seems to know as pure fact...
2530 with correct flange will fit just fine and give you much more than the stock turbos as far as airflow...
It's really simple logic when looking at the actual size of the turbos... Lets take the Garret line of turbos for an example. Say you start out with two GT15 trubos, which are relatively close in size and capability to the Toyota CT12 that give you around 400 hp air flow capability, then you move up to two GT25 turbos which give you about 500 hp worth of capability. That's basically what you're looking at doing.
Now Suprascene is right, if you use 2540R versus a 2530 you would get more power, because even though they're both based on the GT25 turbos the 2540R or any R series HKS for that matter has a more effecient setup for more power in the top end. BUT you are looking at a really good deal on two 2530 and not 2540R. So if you can get these at a great price in the right flange and actually get a hold of an HKS twin turbo header set with WGs you will be in business for possibly a couple of grand less than the average GT2835 twin kit. You won't be a 9 second street supra but you will still have a decent setup that can be tuned to squash most vehicles on the street, including Suprascene's stock twin setup...
