Modern Muscle is now offering ported 6.1L Intakes in 3 levels. Level 1-CNC port matched for stock 6.1L engines. $399.00 Level 2-CNC port matched plus throttle body opening machined and internal blending to runner entries. For mildly modified engines. $695.00 Level 3-CNC port matched plus throttle body opening machined and internal blending to runner entries,plus welding and additional porting. $995.00 All intakes require a $1000.00 refundable core charge. Prices are plus shipping. Product link:http://www.allusasupercenter.com/category_s/495.htm