ISR Performance Exhaust Silencer 4 inch | IS-UNIS-4 vendor_Humble Rumble Part #: ACR-2066

Part #: ACR-2066

Each Alpha radiator uses a dual core design with high flowing fins to maximize performance

2008-2021 Subaru STI (15-17 STI W/OEM SOUND TUBE DELETE)**

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

etc to squeegee out the remaining water

ISR Performance Exhaust Silencer 4 inch | IS-UNIS-4 vendor_Humble Rumble Part #: ACR-2066ISR 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.