Why the part number TB601 to suit VS-VX Ecotec and L67 is different from TB602 VY?

Related articles

• Is it possible to change the IAC valve on the VY V6 engine? As I am planning on buying a new engine soon and I am not sure if I will be receiving a VX or a VY Ecotec.
• I'd just like to know what the difference is between the VX and VY throttle body? As I have an L67 VY.
• Symptoms of a Failing Ignition Coil and How to Spot Them!
• Is it necessary to change the fuel pump and add the fuel pump control module  during l67 conversion  to a VX Berlina Donner car was a VX Calais
• Fitting VS-VY L67 into VN/VP commodore