Price is hard to nail down.
A true radius valve job would be the best option, and 3-5mm larger valves on both intake and exhaust.
Also bump compression to about 10.5:1 which is about a .035 to .045 shave. (Shop will know beter than my hack job math.)
And you could stroke the engine to 2.2L if you realy want to go all the way, but the shoip really needs to know what they are doing. Theres not alot of room for error.
