i could be wrong but i beleive obx makes a bolt on kit for ITB's for the 1UZ
http://www.ebay.com/itm/OBX-ITB-IND...Parts_Accessories&hash=item25852d03c3&vxp=mtr
http://www.ebay.com/itm/OBX-ITB-IND...Parts_Accessories&hash=item25852d03c3&vxp=mtr