FLOTEK Performance cylinder heads feature as-cast ports and are designed for entry level street performance applications operating in the idle-to-5500 rpm range. They are available for 289, 302, 351W engines. WILL NOT ACCEPT STOCK PUSHRODS.

FLOTEK Recommends pushrods from

• Up to .550 Lift

• Does not include Thermactor Plugs (ERG). FLOTEK RECOMMENDATION: Trick Flow Small Block Ford TFS 51400265


Specifications, Features & Optional Supporting Components

Head Bolt Torque50-65-80 Ft-Lb, 75 Ft-Lb on Bottom (Permatex#80631)
Rocker Stud Torque45- 50Ft-Lb
Intake Port GasketFel Pro 1262
Exhaust Port GasketFel Pro 1487, MS15129Y
Head GasketFel Pro 1011-1 or 1011-2, M6051-050
Head Bolts & StudsARP154-3605 (302), ARP154-3603 (351W), ARP254-3708
Head Bolt WashersEDL 9680 (302)
Suggested ManifoldPerformer RPM or Weiand Street Warrior
Spark Plug Starting RangeNGK R5671A/4091, AGSF-32C or Equivalent (hotter or colder) 
Intake Port Volume180cc
Exhaust Port Volume62cc
Combustion Chambers58cc
Max Spring Pocket Diameter1.685”
Rocker ArmsBlumax SBF Aluminum, 1.5:1 3/8 Stud, Must have clearance for Retainers
Intake Valve1.94 or 2.02
Exhaust Valve1.55
Valve Spring FTCL 120# @ 1.800, OP#290@1.20″ C/Bind- 1.160
Valve SpringCL 130# @ 1.75, OP 310# @ 1.25, C/Bind- 1.160
Retainers7 Degree Chrome Moly Retainer
Valve Locks7 Degree Chrome Moly Locks
Rocker Stud3/8” Chrome Moly Rocker Stud, 7/16” avail.
GuideplateHardened Steel FLOTEK Two-piece adjustable Guideplate
Valve SealsViton Positive Seals
Spring CupHardened Steel Cups
Intake Valve SeatCast Alloy
Exhaust Valve SeatCast Alloy
Bronze Valve GuidesManganese Bronze

Part Specification

Flo-Tek Cylinder HeadID#Part Number
SBF Stud and Plate Bare00850134007051203-500
SBF Stud and Plate 2.02 Assembled00850134007068203-5052
SBF Stud and Plate 1.94 Assembled00850134007075203-505
SBF Stud and Plate Flat Tappet Assembled00850134007471203-505FT

Flow Chart



Dimensions & Weight

Small Block Ford Bare18.6 Pounds
Small Block Ford Assembled24.4 Pounds


Additional information

Weight N/A
Dimensions N/A

SBF Stud and Plate Bare (203-500), SBF Stud and Plate 2.02 Assembled (203-5052), SBF Stud and Plate 1.94 Assembled (203-505), SBF Stud and Plate Flat Tappet Assembled (203-505FT)