Can't you guy's order from US dealers or staight from FMF? a pipe ordered in 1-01 should not just be showing up, that a pretty extreme turn around time. I like the rev pipe myself, as for lowend, a rad valve & higher compression will take care of that. if the engine is stock then the stock piston will work for a while, but the wiseco is better and costs less. if you asked for a wiseco piston prior to the rebuild, then the dealer should honor that with no extra charge to you. many US website's won't ship out of the country due the credit card software and online fraud protection, but if you place a phone order they should ship it to you, and a lot faster than 3 months.
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Sage Wilkinson