Hey, I'm not sure what is available for 325. I know that 335 has quite a few options. Have looked into it and found chips for well under your budget, just a few hundred dollars. There isn't much to modify software wise on the 325. The 335 has the twin turbo, with limited psi, the software basically allows you to pick a program that you want to run, which will use max psi, and other variables as well. I don't know a whole lot about it. But do believe the 335 chip can add quite a bit of HP.
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