DNA High Performance Air Box Cover Stage 2 Compatible for KTM RC 390 (22 24) PN: P KT3N20 S2

This new Stage 2 Air Filter features DNA's advanced FCd (Full Contour design) and designed to work exclusively with the DNA stock replacement air filter. Correctly used it will increase the airflow, torque andpower of the engine. Installation info are included with this new DNA Stage 2 Air Filter.Fuel injection recalibration is suggested but NOT necessary. The filtering efficiency of the assembly with the DNA Stage 1 Air Filter (P-KT3N18-0R) is extremely high at 98-99% filtering efficiency (ISO 5011). The airflow of this new DNA Stage2 Air Filter (P-KT3N20-S2) combined ALWAYS with the DNA Stage 1 Air Filter (P-KT3N18-0R) is +95.99% over the stock application! Stock air box with DNA S1 & S2 air filter flow: 73.30 CFM(Cubic feet per minute) @1.5''H2O corrected @ 25 degrees Celsius. | Stock air box withStock paper filter air flow: 37.40CFM (Cubic feet per minute) @1,5 H2O corrected @ 25degrees Celsius. | Fuel recalibration is suggested.