Is one of these nessesary or will a regular wheel spacer do? Using corvette wheels and 1.5 inch spacer on the front with ls1 brakes.

 

Dont need hubcentric although it probably would be better. The regular bolt on adapters have worked fine in the past.

 

No they are not needed .. It's a redundant safety future

As most wheel adapters are lugcentric wich means they are center by proper torquing of lug nuts

Hubcentric is centered by the hub ...
So if there hubcentric ..hence redundant safety ..but it doesn't hurt .. I spend extra to have them hubcentric as I like the tight fit ..Never hurts to be extra safe ..That's my personal opinion tho

If any thing tho I would make them wheel centric to help center wheel ... But it's also not needed if wheels are lugcentric I think most are I could be wrong tho ., I know stock thirdgen wheels where

I personally run hub and wheel centric wheel adapters and love the fit and no little vibrations either

Keep in mind front hub has a taper .. Different wheel adapter company's do not make them the same the ones I've seen... some are not exact fit while others are fit good

Usually corvette wheel guys run non wheel / hubcentric spacer