ISR Performance Exhaust Silencer 4 inch | IS-UNIS-4 vendor_Humble Rumble One of the main complaints

One of the main complaints about the WRX and STI interiors is the extremely low height of the center console arm rest

replacements

By using a 57% larger intercooler core with streamlined intercooler piping

Part #: ACR-2066

ISR Performance Exhaust Silencer 4 inch | IS-UNIS-4 vendor_Humble Rumble One of the main complaintsISR Performance Universal Exhaust Silencers 3" or 4" Can be used on any Exhaust system with 3" or 4" tips. Exhaust needs to be drilled to accommodate the Silencer set screw hole. Set Screw not included This item is non application specific. Please verify compatibility before purchase. May require some modification for proper installation. Note: ISR orders might take a day of processing. If you need it sooner, contact us directly.