Flow Specifications @ 28 in. H2O

Lift (in.) Intake/Exhaust (cfm)

0.200 139/87

0.300 182/130

0.400 224/158

0.500 252/172

0.600 267/180

0.650 269/182

0.700 270/184

Features

• Blended valve bowls
• Competition valve job
• Intake ports match Felpro 375-1262
• Accessory bolt holes machined and drilled
• Intake Valves: 2.020 in. x 4.915 in. OAL
• Exhaust Valves: 1.600 in. x 4.910 OAL
• Valve Angle: 20 Degrees
• Valve Seals: 11/32 in.
• Valve Springs: Hydraulic Flat Tappet 249-981
  • 1.250 in. Diameter
  • 100 lb. Closed
  • 300 lb. Open
  • 1.850 in. Installed Height
  • .525 in. Max Lift
• Retainers: 7 Degree Steel 249-743
• Rocker Studs: 3/8 in.
• Guide Plates: 5/16 in.
• Valve Centerline: 53/119

Notes

• 1/2 in. Head Studs Torque: 100 ft.-lbs. 
• 7/16 in. Head Studs Torque: 70 ft.-lbs. 
• Rocker Studs Torque: 40-45 ft.lbs.
• Angle Milling: .010 in. per cc
• Flat Milling: .0060 in. per cc
• Spring pockets may not be cut larger or deeper than 1.550 in.
• Uses standard lifters and Ford roller rockers

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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