how would this one go? http://www.ebay.com.au/itm/Kinugawa-Turbocharger-4-TD06SL2-25G-T3-V-Band-450P-/280775108722?pt=AU_Car_Parts_Accessories&hash=item415f802872
rated to 650hp, so should easily achieve 300rwkw on an rb25 with good boost control, being ext gate. however sounds like it will hit full boost between 4500-5000rpm on pump 98. would that sound about right?