It seems I remember back in the early eighties that the Turbo model came out a couple of years after I bought my 944 in 1983. Yet, I keep seeing reference to "83 944 NA". or ..."N/A". I assume "NA" means "normally aspirated".

Are these after market upgrades, or am I missing something?

If this is a stupid question, my apologies ahead of time... I have only recently begun to research the car seriously.

Bob