Does any one have these? [ http://www.jimwolftechnology.com/customer_part_detail.asp?PartID=442 ] if so how do you like them. Ill be upgrading to different turbos pretty soon. these seem pretty cheap compared to the others. are they anything like sport 500's? 530's? anyone have any dyno sheets of them? are they a direct bolt on from jwt or do they need to be modified, or worked like the gt28r? thanks for any insight how is the spool up? lag? thanks