turbo = LS, Nitrous = GSR, N/A = both have same amount potential. it just depends on if you want VTEC... VTEC will be bad if you wanna go turbo, on stock internals you can't push more than 15 psi with stock internals on VTEC. i've seen a VTEC engine turboed, when the VTEC kicks in the whp drops like a bomb! just my info to you!