Quick view Blox Racing Blox Racing - Exhaust Muffler Delete Single Wall Stainless Quad Tips - Subaru WRX/STI 2015-2018 Blox Racing Axleback Muffler Delete Part Number: BXEX-51104 Piping Size: 2.5" Stainless Steel, mandrel bent pipe Tip: Quad Single Wall Tips Tip Style: Slant... â‚©346,484 Add to Cart