This Stage 2 Air Box Cover is a CNC machined out of billet black polyamide 6, and designed to work exclusively with the DNA stock replacement air filter. Correctly used it will increase the airflow, torque and power of the engine.

Installation info are included with this DNA Stage 2 Air Box Cover and fuel injection recalibration is necessary.

The filtering efficiency of the assembly with the DNA Stage1 Air Filter (R-Y7N14-01) is extremely high at 98-99% filtering efficiency (ISO 5011).

The airflow of this DNA Stage2 Air Box Cover (TC-Y7N14-S2) combined ALWAYS with the DNA Stage 1 Air Filter (R-Y7N14-01) is +179.76%! over the YAMAHA stock application!

Important Note: The DNA Stage 1 Air Filter R-Y7N14-01 is sold separately

DNA S1 & S2 air filter flow: 171.30 CFM (Cubic feet per minute) @3"H2O corrected @ 25degrees Celsius

YAMAHA stock paper filter with stock air box cover: 61.23 CFM (Cubic feet per minute) @3"H2O corrected @ 25degrees Celsius