Process West Top Mount Intercooler Black for Subaru Liberty GT BL/BP 04-09 [PWTMIC11B]Core Size: 400 x 198 x 90mm Strong & Durable Intercooer Hoses included Hood Splitter included Increasing the intercooler surface area beyond that of the factory unit is all well and good but only if all of the ambient air is available to all of the upgrade intercooler so maximum heat exchange can take place. The answer here is of course a revised under bonnet duct. The new Process West 04 09 Subaru Liberty Legacy GT Top Mount Intercooler addresses all