Spark Exhaust Ducati Panigale V4 S/R and Streetfighter V4 S "Double Dyno" Titanium / Inconel Semi-Full Exhaust System (WSBK Evolution 23 - Updated 2.0 System). Constructed with dual titanium silencers fitted with carbon ending. Born for the heavy duty abuse from racing with a strong Inconel collector and visible 2-into-2 Titanium high-mount link pipe into the silencers. COMPATIBLE WITH ORIGINAL FAIRINGS AND CLOSED FAIRINGS FOR RACE USE. COMPATIBLE WITH ORIGINAL LICENSE PLATE HOLDER. NOT COMPATIBLE WITH PASSENGER FOOTPEGS OR TAIL LOCK. 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. *Heat shield included, Does not include removable DB Killer.