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Rocker arm shaft for Harley Davidson models
the header has larger tubes to improve airflow and increase performance
This system does not require the removal of any standard emissions equipment
Make Model Year YAMAHA YZ450F 20-22 YAMAHA YZ450FX 19-23
Machined from Billet Aluminum with a Boyesen one-way reed valve to vent the excessive crankcase pressure
DYNOJET Jet Kit - Suzuki GSXR1100, Katana 3123 Chrome Steel Banjo Fitting Rocker arm shaft for HarleyStage 1: stock engine filters, stock modified pipes; about a 5% power increase Stage 1: stock engine filters, stock modified pipes; about a 5% power increase Stage 2: stock mild modified engine, stock modified pipes, stock modified filters; about an 8% power increase Stage 3: stock mild modified engine, stock modified pipes, individual air filters; driveability may be compromised, N A for some motors; about a 10 15% power increase Stage 7: race only,