I payed $380 for mine. I would think you would need a bigger scoop. Your intercooler would be starving for more air. I have the bigger scoop on mine. Check it out under "Show Form".
Is this the USDM STI intercooler or JDM? I was reading something the other day that said only the JDM STI intercooler would fit the US WRX. If it is JDM where did you order from?