US spec should have a MUGEN USA serial # and MUGEN USA stickers (seal) on the box. Just like that one from EBAY.

And I think someone already posted the MUGEN Europe spec.....

However....US kits has better or different materials? I doubt it.....As MS already mentioned, US kits came with a set of foams. that will tell the different between US kits and ASIA kits....which has no foams.

And for sure.......US kits should have better tech support from Mugen USA. But does that mean when we call MUGEN USA for questions.......we must provide the Serial # beforehand?

Don't forget, Mugen is a Japanese brand.......since when USA customer has the best stuff that is mfr by Japan...? Skyline GTR - still waiting...EVO8, only the water down version....STi WRX...may be the closest that we can get.

Buy US spec.......if your kit missing a screw, Mugen USA will mail it to you free of charge. If you get a oversea kit....you have to learn how to speak chinese or japanese first and be ready for the heavy long distance phone bill.

I remembered VETEQ did that 5 years ago with a VETEQ Ownership VIP club with a VIP card and #......