Holley Single Stage 50 Power Valve - Standard Flow 12199903 Hellwig 11-19 Chevrolet Silverado 2500

Hellwig 11-19 Chevrolet Silverado 2500 HD Solid Heat Treated Chromoly 1-5/16in Big Wig Rear Sway Bar

Our 4700 features a 1

810 in Spring ID

Impact Vapor / Charger / Zamp Helmets

The one-way screen design allows oil coming off the crank to pass through the screen while not allowing the oil in the sump to reach the rotating assembly

Holley Single Stage 50 Power Valve - Standard Flow 12199903 Hellwig 11-19 Chevrolet Silverado 2500Single Stage Power Valves Standard Flow #HLY125 10 Opening Vacuum 1. 0" Hg #HLY125 25 Opening Vacuum 2. 5" Hg #HLY125 35 Opening Vacuum 3. 5" Hg #HLY125 45 Opening Vacuum 4. 5" Hg #HLY125 50 Opening Vacuum 5. 0" Hg #HLY125 65 Opening Vacuum 6. 5" Hg #HLY125 75 Opening Vacuum 7. 5" Hg #HLY125 85 Opening Vacuum 8. 5" Hg #HLY125 95 Opening Vacuum 9. 5" Hg #HLY125 105 Opening Vacuum 10. 5" Hg Holley has been the undisputed leader in fuel systems for over