ahh darn, info i found on moddedmustangs:
Trick Flow 4.6L 2V Track Heat Intake Manifold
General Specifications
Made in the U.S.A
Materialâ€â€A319 Aluminum alloy.
Designed for 1999-2004 4.6L Mustang GT ( modifications required for 1996-’98 models ).
Fits 1999-2004 Power Improvement head ports.
75mm Throttle Body Inlet.
Symmetrical high velocity intake port design.
3-PC design.
Accepts, but does not require aftermarket high-flow fuel rails.
2001 Special Edition Mustang performance when used on unmodified Mustang GT without costly additional components.
Increased performance potential over similar more expensive manifolds.
RPM Range: 1500-6500 when used with un-ported cylinder heads.
RPM Range: 1500-7200 when used with aftermarket or ported cylinder heads.
Same overall height as stock plastic lower intake manifold/ upper plenum assembly to minimize hood clearance issues.
Complete kit with detailed installation instructions for 1999-2004 4.6L Mustang GT.
Part Number: TFS-51800002 ( Silver metalic powder coated finish)
Part Number: TFS-518B0002 ( Natural finish )
Part Number: TFS-51811002 ( Black powder coated finish )
Estimated M.S.R.P ( < or = ) $ 799.00 ( Available Early Spring 2007 )