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Product Summary

289, 302, 351W, Assembled Cylinder Head Style, Aluminum

  • Features hardened locks and retainers
  • Head is compatible with most roller camshafts
  • Includes high-temp exhaust seats and bronze guides
  • Made from lightweight, yet strong aluminum with a natural finish
  • Intake valve diameter measures 1.940" and the exhaust valve diameter measures 1.540"

Key Specs

Cylinder Head StyleAssembled
Material TypeAluminum
FinishNatural
Combustion Chamber Volume58cc
Intake Runner Volume180cc

Need To Know

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Return Policy

Details

You don't need to spend a fortune to get a top-performing, lightweight aluminum cylinder head for your small-block Ford V8. This Flo-Tek head has a long list of high-end features, minus the hefty price tag.

Will likely need to plug the EGR connection holes in the end of these heads on 86-up fords. Please use 5775804 to do so. One set of plugs will do a pair of heads.

  • Head is sold individually
  • 180cc intake runners
  • 62cc exhaust runners
  • 1.94" intake and 1.54" swirl-polished exhaust valves
  • 58cc chambers
  • Performance valve springs (.550 lift)
  • 130 lbs. spring seat pressure
  • Compatible with most roller camshafts
  • Hardened locks and retainers
  • PC seals
  • High-temp exhaust seats
  • Multi angle valve job
  • Bronze guides
  • 3/8" rocker studs and guide plates

See how this Flo-Tek head stacks up against the competition in Car Craft Magazine's tech article; 6 Small Block Ford Cylinder Heads That Work.

Head Flow Specs:

Lift        Intake        Exhaust
.400      209          137
.500      223          161
.600      248          191

Application

  • Recommended Spark Plug:  NGKR5671 or Autolite AR3932
  • Valve Spring Type:  Single w/ Damper
  • Valve Spring Application:  Roller
  • Valve Spring Diameter:  1.465" O.D.
  • Valve Spring Seat Pressure:  115 lbs.
  • Valve Spring Rate:  240 lbs/in.
  • Max lift: 0.550"
  • Intake Valve:  1.94"
  • Exhaust Valve:  1.54"
  • Valve Type:  Stainless, Swirl-Polished
  • Air Flow Data:
    • Intake
      • 223 CFM @ .500"
      • 248 CFM @ .600"
    •  Exhaust
      • 161 CFM @ .500"
      • 191 CFM @ .600"

Specs

  • Recommended Spark Plug:  NGKR5671 or Autolite AR3932
  • Valve Spring Type:  Single w/ Damper
  • Valve Spring Application:  Hydraulic & Solid Flat Tappet 
  • Valve Spring Diameter:  1.465" O.D.
  • Valve Spring Seat Pressure:  130 lbs.
  • Valve Spring Rate:  280 lbs/in.
  • Intake Valve:  1.94"
  • Exhaust Valve:  1.54"
  • Valve Type:  Stainless, Swirl-Polished
  • Air Flow Data:
    • Intake
      • 223 CFM @ .500"
      • 248 CFM @ .600"
    •  Exhaust
      • 161 CFM @ .500"
      • 191 CFM @ .600"

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

Specifications

KEY SPECS
MFG. Part #203505
BrandFlo-Tek
Cylinder Head StyleAssembled
Material TypeAluminum
FinishNatural
Combustion Chamber Volume58cc
Intake Runner Volume180cc
GENERAL
Exhaust Runner Volume62cc
Combustion Chamber Volume Range50cc - 59cc
Intake Runner Volume Range180cc - 189cc
Exhaust Runner Volume Range60cc - 69cc
Spark Plug StyleAngle
Intake Valve Diameter1.94"
Exhaust Valve Diameter1.54"
Spring Diameter1.47"
NotesRecommended Spark Plug: NGKR5671 or Autolite AR3932 . Bored for 1/2" head bolts.
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