Flotek 375-5059 Jackal 375cc Cylinder Head - Assembled, For Chevrolet Big Block

Jackal Series Aluminum 375cc Cylinder Head - Assembled, Solid Roller, For Chevrolet Big Block Mark IV

Flotek 375cc big block Chevy cylinder heads are designed with the racer in mind. They're fully CNC ported and feature 127cc combustion chambers. The heads are cast from a permanent steel mold and finished with a beautiful polycrystalline diamond-cut finish. Their thick deck design and high-capacity water jackets make them a reliable choice for racing applications. These models accept stock pistons and feature raised valve cover rails (exhaust port location raised 0.360 in.). Flotek 375cc BBC cylinder heads are just wicked for the marine or strip enthusiast!

Specification:

• Combustion Chamber Volume (cc): 127
• Intake Runner Volume (cc): 375cc
• Exhaust Runner Volume (cc): 133cc
• Cylinder Head Style: Assembled
• Cylinder Head Material: Aluminum
• Intake Port Shape: Rectangular
• Intake Valve Diameter (in): 2.350 in.
• Cylinder Head Finish: Natural
• CNC-Machined Combustion Chamber: Yes
• CNC-Machined Intake Runner: Yes
• CNC-Machined Exhaust Runner: Yes
• Combustion Chamber Style: Heart
• Intake Port Location: Standard
• Exhaust Port Shape: Oval
• Exhaust Port Location: Raised
• Spark Plug Style: Angle
• Intake Valves Included: Yes
• Exhaust Valves Included: Yes
• Exhaust Valve Diameter (in): 1.880 in.
• Valve Springs Included: Yes
• Maximum Valve Lift (in): 0.900 in.
• Outside Diameter of Outer Spring (in): 1.625 in.
• Damper Spring Included: Yes
• Number of Springs Per Valve: Dual
• 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: 7/16-20 in.
• 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: 24/4
• Exhaust Valve Angle: 15/4
• Valve Guides Included: Yes
• Valve Guide Material: Manganese bronze
• Valve Seats Machined: Yes
• Valve Seat Machine Style: 3-angle
• Valve Seat Material: Powdered metal
• Steam Holes Drilled: No
• Oiling Style: Through pushrod
• Machined for O-Ring: No
• Heat Crossover: No
• Quantity: Sold individually