ATK HPSBF205 Small Block Ford 58cc/205cc Cylinder Heads Assembled (Set)

Description

Specifications:
Material A356 Aluminum
Intake Port Volume 203cc
Intake Port Dimension 2.115″H x 1.300″W
Intake Port Location Stock
Intake Valve Size 2.080” (8mm Stem)
Intake Valve Material Stainless Steel
Exhaust Port Volume 70cc
Exhaust Port Dimension 1.405″ H x 1.402″ W
Exhaust Port Location Raised .125”
Exhaust Valve Size 1.600” (8mm Stem)
Exhaust Valve Material Stainless Steel
Combustion Chamber Size 58cc
Valve Cover Bolt Pattern Perimeter Bolt
Valve Angle 20° Degree
Valve Spring Pocket Diameter 1.646″ O.D
Valve Spring Double
Valve Spring Setup Height 1.800”
Valve Spring Closed Pressure 150lbs (W/Retainer)
Valve Spring Open Pressure 1.200” .600” Lift 390lbs
Valve Spring Max Lift .625”
Valve Guide Material Manganese Bronze
Valve Seal Material Viton
Valve Seat Material Powder Metal
Retainer Material Steel with 7° Bead Lock Keepers
Deck Thickness .750”
Minimum Bore Diameter 4.000″
Flat Mill .006″ per cc 54cc Max (from 58cc)
Spark Plug Dimensions 14mm x .750″ with Gasket Seat
Head Bolt Diameter ½”
Torque Specifications Per Application Based on Factory or Aftermarket Bolts/Studs

Recommended Components:
Intake Port Gasket Fel Pro MS90103-1 or Per Application
Exhaust Port Gasket Fel Pro 1487 or Per Application
Head Gasket Fel Pro 8548PT2, 1011-1 or Per Application
Head Bolts ARP 154-3603
Head Studs ARP 254-4503
Spark Plug Starting Range Autolite 3923 or Per Application
Lifters Factory Hyd. Roller Lifters or Per Application
Pushrods Per Application (must check length)
Rocker Arms Aftermarket Roller Rockers

Disclaimer: It’s up to the installer to verify all fitment and components will work on the engine. Everything listed is just a recommendation. ATK is not responsible for damage to heads or engines due to miss matched components or wrong application.

These cylinder heads are Flow Tested on a Super Flow SF600 bench with a 4.030” bore size @28” water. Clay intake radius was used, Flow tube was not used on the exhaust port.