I just ordered me the .21 tuned promo kit, i reakon its very well priced, set me back $550AUD landed, which would be the same price as if i bought another boss engine (what ive been running) and a new fls pipe, so im getting the goodies it comes with free. Ive run the grp boss for the past yr and they are better than anything else ive tried lately, especially when it comes to QC, no doubt these new grp's will be the same.