Don't know the cost but all it should take is a new compressor wheel and machining the compressor cover to match, plus maybe a compressor backing plate. Will make a huge difference in performance. I went from a TE34 to a PTE54, which makes a little more power than a TE60 (same compressor wheel, bigger turbine wheel), and went from a best of 12.57 to 12.18 on 93 octane pump gas. That's about 40-45 more rwhp, octane limited.
