unfortunatly with the Libertys the Bellmouth once again has to be specailly made for the Aussie Spec Libs. Libs run into the same problem as the WRXs.
WRXs and the Libs share the same steering knuckle which is larger then the STi WRX ones. so if u use a cast head like the Invidia or a COBB Tuning down pipe the Dump will fit up no worries at all but soon as load is put on the engine whilst turning a corner the knuckle WILL hit the Dump pipe.
Here is a design that is best suited to the Libertys/WRX
The one on the left is the conventional Down Pipe from USA with CAST head
The one on the Right is the one used for Aus Spec cars .. Toemi Also use a similar design head on their Twin Scrol Down pipe.. I beleive the HKS, SARD and ZEROSPORTS also use this design..
Troy