Unsure what bilstein tuned means, but i guess it means i have some oem bilstein shocks, dunno how to identify the same though

I think my car is very similar to Brian's 2012 street project car and so I was looking at following the mods done to the same.
I've just got the super-q from Chris at mx5parts and its really good - I chose to remove the silencing baffles and the muffler has a decent growl (10% more than stock) when accelerating and yet no drone at cruising speed (2700rpm). Overall quite pleased with the minor (perhaps perceived

I'm not looking at headers yet as they are not street legal here in Melbourne, but will the gwr mid pipe when added to my stock header and super-q combo improve things on my car (performance gains? or just a better note?)
Also I keep travelling to San Jose every few months and so was wondering if anyone here can comment on the dimensions and weight of progress rear/front sway combo package as well as progress springs to see if I can carry it back with me on the long flight back to Australia. Also is it recommended to get the end links to go with sways or are stock end links good enough?
Lastly if I get the progress springs, do I need anything else like bump stops, etc. to go with them or are the stock ones ok? Note I'm on stock 17x7 rims running the 205/45 tires for now, but may go up to 215/45 on either stock rims or 17x8(or 7.5).
Thanks for the guidance, hope I can carry some stuff back from US and looking forward to building my mx5 similar Brian's 2012 mx5
