KTM / Husqvarna 125CC 250CC & 390CC DNA Stage 2 Kit (2020-2024) This new Stage 2 Air Filter features DNA®’s advanced FCd (Full Contour design) and designed ktm-husqvarna-125cc-250cc-390cc-dna-stage-2-kit-2020-2024/ to work exclusively with the DNA stock replacement air filter. Correctly used it willincrease 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 KTM / HUSQVARNA 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 with KTM/HUSQVARNA stock paper filter air flow: 37.40CFM (Cubic feet per minute) @1,5” H2O corrected @ 25degrees Celsius. This DNA® Stage2 Air Filter is designed for:‘Road, Off Road & Race use’. Fuel recalibration is suggested.
