R1-Spec Silencer for the R1-Spec MufflersWant to enjoy the track oriented R1-Spec exhaust system on the streets? Then the R1-Spec Silencer provides more comfort to your daily driving track car! Part Number REMARK R1 2.5" Silencer - RO-C1063X-SS (for R1 with 4.5" Tip) REMARK R1 3" Silencer - RO-C1076X-SS (for R1 with 4.5" Tip) REMARK R1 2.5" Silencer - RO-C1063X-SS40 (for R1 with 4" Tip) REMARK R1 2.5" DUAL Silencer - RO-C2063X-SS (for R1 Dual Exit which has 4" Tips) Compatible Exhaust Subaru WRX (2022+) : RK-C1076S-03 (3" piping - compatible with both) Subaru WRX (2022+): RK-C2076S-03 (Compatible with RO-C2063X-SS) Subaru WRX (2022+): RO-TSVB-R1D (Compatible with RO-C2063X-SS) Subaru WRX / STI VA (2015-2021) : RK-C1076S-01 (3" piping - compatible with both) Toyota GR86 / Subaru BRZ (2022+) : RK-C1063T-04 (2.5" piping - compatible with 2.5") Scion FRS / Toyota 86 / Subaru BRZ (2013-2021) : RK-C1063T-03 (2.5" piping - compatible with 2.5") Nissan 370Z (2009-2021) : RK-C1076N-01 (3" piping - compatible with both) Subaru Impreza WRX / STI GR Hatchback (08-14) : RK-C1076S-02 (3" piping - compatible with both)' Honda Civic Si 22+ : RK-C1063H-08/ RK-C1063H-08T / RK-C1063H-08TF (2.5" piping with 4" tip) Exhaust Type R1-Spec Mufflers (Stainless Steel R1-Spec Muffler / Titanium R1-Spec Muffler) Disclaimer R1-Spec Mufflers sold separately. For older R1-Spec Catback Exhaust Systems, you will have to drill a small hole on the R1-Spec Muffler to install with hardwares that comes with the exhaust system. Shipping Dims Single Silencer - 11x5x5" , 3 lbs.Dual Silencers - 11x6x6" , 3 lbs.