Bolt on a set of affordable World Products S/R Torquer heads and add some serious muscle to your small block Chevy—up to 30 horses over stock. The heads are available bare or assembled for a variety of applications. These cast iron heads feature: * Power-building 170cc intake runners * Dual-pattern raised, leak-free valve cover rails * Tapped for screw-in rocker arm studs * 2.02 in. intake/1.60 in. exhaust valves * Umbrella valve seals * 1.250 in. valve springs * 7 degree retainers and locks

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Melling GM LS Dual Valve Spring Kit, Max Lift: 0.700", Steel Retainers 160LBS@ 1.800" Seat Pressure, 482LBS @ 1.100" Open 1.045" Coil Bind, Kit

Melling GM LS Dual Valve Spring Kit, Max Lift: 0.700", Steel Retainers 160LBS@ 1.800" Seat Pressure, 482LBS @ 1.100" Open 1.045" Coil Bind, Kit

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