The sound level measures 95.5 DB (at 4200 RPM) using the SAE J1287 sound test. It also includes a spark arrestor that can be added for trail use. For questions please call Customer Service. The item "POLARIS RZR4, RZR XP 1000 SLP SLIP ON SILENCER EXHAUST 2014 09-111" is in sale since Thursday, June 14, 2018.This item is in the category "eBay Motors\Parts & Accessories\ATV, Side-by-Side & UTV Parts & Accessories\Exhaust". The seller is "ewsmotorsports" and is located in Nine Mile Falls, Washington. This item can be shipped worldwide.