FLOTEK 185-505 Features:

FLOTEK 185cc Small Block Ford Thumper cylinders heads feature a raised "floor" and "roof" design. Why you ask? This allows a better approach to the valve when attempting to achieve high performance and to keep air and fuel attached to short turn radius for increased torque over a wider rpm range without sacrificing high-rpm power. Coupled with the new chamber design for better wet flow quality and a "W" design exhaust port to keep flow attached to the port floor which greatly increases exhaust gas evacuation verses original 180cc design. Always thinking of the racer, the FLOTEK Thumper 180 accepts stock manifold!

Specifications:

• Combustion Chamber Volume (cc): 60
• Intake Runner Volume (cc): 185cc
• Exhaust Runner Volume (cc): 62cc
• Cylinder Head Style: Assembled
• Cylinder Head Material: Cast Aluminum
• Camshaft Style: Hydraulic Roller
• Intake Port Shape: Rectangular
• Intake Valve Diameter (in.): 2.020 in.
• CNC-Machined Combustion Chamber: No
• CNC-Machined Intake Runner: No
• CNC-Machined Exhaust Runner: No
• Intake Port Location: Standard
• Exhaust Port Shape: Square
• Exhaust Port Location: Standard
• Intake Valves Included: Yes
• Exhaust Valves Included: Yes
• Exhaust Valve Diameter (in.): 1.600 in.
• Valve Springs Included: Yes
• Maximum Valve Lift (in.): 0.550 in.
• Outside Diameter of Outer Spring: 1.460 in.
• Damper Spring Included: Yes
• Number of Springs Per Valve: Single
• Retainers Included: Yes
• Retainer Material: Chromoly Steel
• Locks Included: Yes
• Lock Style: 7 Degree
• Valve Stem Seals Included: Yes
• Valve Stem Seal Style: Positive Stop
• Rocker Arm Studs Included: Yes
• Rocker Arm Nut Thread Size: 3/8 in.-24
• Rocker Arms Included: No
• Rocker Arm Nuts Included: No
• Guideplates Included: Yes
• Guideplate Pushrod Size: 5/16 in.
• Valve Cover Mounting Style: Perimeter Bolt
• Accessory Bolt Holes Drilled: Yes
• Intake Valve Angle: 20
• Exhaust Valve Angle: 20
• Valve Guides Included: Yes
• Valve Guide Material: Manganese Bronze
• Valve Seats Machined: Yes
• Valve Seat Machine Style: 3-Angle
• Valve Seat Material: Cast Alloy
• Cylinder Head Finish: Natural
• Steam Holes Drilled: No
• Oiling Style: Through Pushrod
• Machined for O-Ring: No
• Heat Crossover: Yes
• Remanufactured: No
• Quantity: Sold Individually

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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