Edelbrock Rollin Thunder Hydraulic Roller Camshaft - Lift 0.625 / 0.639 in - Duration 236 / 245 - 112 LSA - Big Block Chevy 2261 JE Pistons 218:1 Gear Ratio And 4-Way

218:1 Gear Ratio And 4-Way Roller Fairlead

Timing window with four possible locations

2007 GMC Sierra 1500 HD Classic

ABC / Straight Up

REBUILDABLE

Edelbrock Rollin Thunder Hydraulic Roller Camshaft - Lift 0.625 / 0.639 in - Duration 236 / 245 - 112 LSA - Big Block Chevy 2261 JE Pistons 218:1 Gear Ratio And 4-WayEdelbrock Rollin' Thunder camshafts are designed to improve horsepower and torque, produce a great sounding performance idle and provide excellent vacuum at idle to support power accessories. Rollin' Thunder camshafts feature more aggressive lift profiles than possible with conventional flat tappet hydraulic cams, without excessive valve overlap that can compromise low rpm drivability; reduced friction provided by roller tappets makes this combination