Spark Exhaust for Ducati Panigale V4 S/R and Streetfighter V4 S "Double Dyno"/"Double Grid-O" Titanium Full Exhaust System (WSBK Evolution 23 - Updated 2.0 System). Constructed with dual titanium silencers fitted with carbon ending. From the experience gained in WSBK, Spark offers a double exhaust underseat left and right side designed to get the maximum performance. Dyno Tested for maximum horsepower increase, 105-110 db @ 5500rpm. Ducati Panigale V4 exhausts are handcrafted in Italy. Non-Homologated Racing Version for Maximum Performance. Race headers each have an O2 bung hole on each collector (1-2-3-4). For perfect performance, throttle response and durability, ECU remapping is recommended. COMPATIBLE WITH ORIGINAL FAIRINGS AND CLOSED FAIRINGS FOR RACE USE. NOT COMPATIBLE WITH ORIGINAL LICENSE PLATE HOLDER. NOT COMPATIBLE WITH PASSENGER FOOTPEGS. HEATSHIELD INCLUDED WITH THIS SYSTEM. *Does not include removable DB Killer.