Thumpr Retro-Fit Hydraulic Roller Camshaft
• Lift: .513"/.498"
• Duration: 283°/303°
• Lobe Separation Angle: 107°
• RPM Range: 1700-5500
  
  High performance street, stock converter ok,best with 2000 + converter and gears,choppy/thumping idle

  Pontiac; Super Duty; SD; SD455; HO; 455 HO; Trans-Am; Catalina; Firebird; Formula; 421; 455; 400; 428; 350; 265; 301; 370; 389; 301; 287; 317; 347; Ram Air; Ram Air IV; Ram Air III; Bonneville; Grand Prix; LeMans; Parisienne; Grand Am; Century; Regal;

  
  High performance street, stock converter ok, best with 2000+ converter and gears, choppy/thumping idle.
  

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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