my mate is a harley tuner,with a workshop at the back of his house,he has a flow test bench ,and a pro sandblaster chamber,and every bit of eqiptment ,he says the evo engine is similar to that of the harleys he tunes,an engine he tuned took the bike to a 8 second quarter,i told him of the great trade in shiny bits,and reckons,size part he can polish to a high gloss,and also for tuning evo heads ,any one out there like to get in touch e-mail me,or using the forum. :coolsm: