If it's an HE351, it should be a healthy upgrade over stock, though I have no personal experience with them. I'd think they'd be too restrictive for much over stock 3rd Gen power levels. Keep in mind we need flow for these engines to operate at max efficiency. That is the general consensus, though some think they are much better than the H1C/ HX35s.
I bet the thing would triple your spool-up, no matter what it did otherwise.
Daniel