HT Autos Side Skirt Extensions 2006-2007 WRX/2004-2007 STI - FastWRX.com
Amazon.com: Side Skirts Compatible with 2015-2021 Subaru WRX STI 4-Door Sedan Model, Splitter Lip Rocker Panel Extension Body Kit for Sport, Sport-Tech, Premium, Limited Models 2Pcs : Automotive
Side Skirt Extensions for 02-07 Subaru WRX / STI (GD) – BattleAero
2015 - 2021 Subaru WRX/STI Side Skirt Extension V5 | WRX STI Skirts – AeroflowDynamics