No the semi bucket seat doesn't protect you from whiplash alone. There are a lot of other factors.

http://www.spineuniverse.com/conditions/wh...lash-prevention
http://www.whiplashprevention.org/Consumer...es/Default.aspx

it's not related at all...

Sure, are you willing to fork out $$$ for a good semi bucket seats? A used 2nd hand one such as those from Recaro can go up from RM3k onwards. Brand new ones with side airbags can cost up to RM9k.

Best for you to search for international manufacturer of semi bucket and full bucket seats with the anti-whiplash protection.

you are going to get rear ended on a daily basis?
anti-whiplash is just trickery they built into the seat so that the seat moves instead of stay rigid when heavy forces are introduced into the passenger cabin in order to support the passenger itself..

and it can be undone by some people who likes to recline their seats so far back down that they are practically not leaning into the backrest itself let alone having the headrest to support anything when shit happens...

i am not sure if any reputable sports seat makers introduced any seats with whiplash protection??

why would you look at semi buckets for comfort anyways... if those seats are good at anything at all ... is to introduce discomfort into any car not to count harder to get in and out of the car...

are the stock seats not cushy enough or because the fabric is not giving you the comfort you desire... you can go to upholstery shops and see if they can add more foam or even leather the thing if comfort is what you are looking for...

then it's very simple since you prefer semi buckets... it's a case of whether you want comfort or safety? and if such a thing where both comfort and safety can co-exists... don't start complaining about the price pulak...

sscus website pun lama dah tak update. Ya for now has to settle for this brand and see how it goes.

The more I look into it, semi now is just for the look while comfort may be not far from stock seat.

And thanks guys for the input. 

If you intend to use the car for racing or any type of motorsports, may it be open track days or even spirited drives through, I would advise against replica seats due to safety concerns. Get original ones or 2nd hand ones. Just my 2cents

In all honesty, we can only find out the real answer when we get into a crash. By that time, it might have already been too late.