Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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Shop Flo-Tek Products At Speedway Motors

After recognizing the need for user-friendly bolt-on aluminum heads, Tri-State Cylinder Head introduced its Flo-Tek product line especially for performance enthusiasts. The company has developed a line of fully assembled, ready to bolt on, high performance aluminum cylinder heads for both street/strip and hard core racing engines.

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  • Flo-Tek 408-500 Big Block Chevy Aluminum Cylinder Head, 360cc, Bare
    Flo-Tek 408-500 Big Block Chevy Aluminum Cylinder Head, 360cc, Bare
    SKU-72250360
    x
                
    • Head is sold individually
    • 2.250” intake valve, 1.880” exhaust
    • 360cc intake runners 
    • 128cc exhaust runners
    • 121cc chambers
    • PC seals
    • High temp exhaust seats
    • Manganese bronze intake guides
    • Phosphor bronze exhaust guides
    • Multi angle valve job
    • Angle plugs
    • Sold individually
  • Flo-Tek 102500 Bare S/B Chevy Aluminum Head, Straight Plug
    Flo-Tek 102500 Bare S/B Chevy Aluminum Head, Straight Plug
    SKU-7221000
    x
                

    You don't sacrifice quality for a low price - get both with a of Flo-Tek aluminum cylinder head. This Chevy aluminum head is loaded with high end features like bronze valve guides and a multi angle valve job. These are a pre-1986 design small block Chevy cylinder head. Sold each.

    • Head is sold individually
    • 180cc intake runners
    • 62cc exhaust runners
    • 64cc combustion chambers
    • Machined for 3/8" screw-in studs
    • Machined for 2.02"/1.60" valves
    • Ready for assembly
  • Flo-Tek 102505 Assembled S/B Chevy Aluminum Head, Straight Plug
    Flo-Tek 102505 Assembled S/B Chevy Aluminum Head, Straight Plug
    SKU-7222000
    x
                

    You don't sacrifice quality for a low price - get both with a Flo-Tek aluminum cylinder head. This Chevy aluminum head is loaded with high end features like bronze valve guides, multi angle valve job, and 3/8" screw-in rocker studs with guideplates. This is a pre-1986 design small block Chevy cylinder head with a standard exhaust port design. Heads are sold each.

    • Head is sold individually
    • 180cc intake runners
    • 62cc exhaust runners
    • 64cc combustion chambers
    • 2.02" and 1.60" stainless steel valves
    • High performance springs for .550" lift
    • Compatible with most flat tappet camshafts
    • Five angle valve job
    • Bronze guides
    • Straight plug
    • 3/8" screw-in studs and guide plates
    • Port for temperature probe
    • Works well with most flat tappet street cams

    Flow Numbers:

    • Valve Lift     .400"     .500"     .600"
    • Intake           206       237       244   
    • Exhaust        165       177       187
  • Flo-Tek 305-505 Big Block Chevy Complete Aluminum Cylinder Head, 320cc
    Flo-Tek 305-505 Big Block Chevy Complete Aluminum Cylinder Head, 320cc
    SKU-72255320
    x
                
    • Head is sold individually
    • Stainless swirl polished valves  
    • 2.250” intake valve, 1.880” exhaust
    • 320cc intake runners 
    • 128cc exhaust runners
    • 121cc chambers
    • High performance springs (.600 lift hyd flat tappet)
    • PC seals
    • Hardened locks and retainers
    • 7/16” screw-in studs and guideplates
    • High temp exhaust seats
    • Manganese bronze intake guides
    • Phosphor bronze exhaust guides
    • Multi angle valve job
    • Angle plugs
    • Sold individually
  • Flo-Tek 203505 Small Block Ford Aluminum Cylinder Head
    Flo-Tek 203505 Small Block Ford Aluminum Cylinder Head
    SKU-7223000
    x
                

    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.

    • 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)
    • 115 lbs. spring seat pressure
    • Compatible with most flat tappet 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

  • Flo-Tek 101500 Bare S/B Chevy Aluminum Head, Angle Plug
    Flo-Tek 101500 Bare S/B Chevy Aluminum Head, Angle Plug
    SKU-7221200
    x
                

    You don't sacrifice quality for a low price - get both with a of Flo-Tek aluminum cylinder head. This Chevy aluminum head is loaded with high end features like bronze valve guides and a multi angle valve job. These is a pre-1986 design small block Chevy cylinder head. Sold each.

    • Heads are sold individually
    • 180cc intake runners
    • 62cc exhaust runners
    • 64cc combustion chambers
    • Machined for 3/8" screw-in studs
    • Machined for 2.02"/1.60" valves
    • Ready for assembly
  • Flo-Tek 306-500 Big Block Chevy Aluminum Cylinder Head, 320cc, Bare
    Flo-Tek 306-500 Big Block Chevy Aluminum Cylinder Head, 320cc, Bare
    SKU-72250320
    x
                
    • Head is Sold Individually
    • 2.250” intake valve, 1.880” exhaust
    • 320cc intake runners
    • 128cc exhaust runners
    • 121cc chambers
    • PC seals
    • High temp exhaust seats
    • Manganese bronze intake guides
    • Phosphor bronze exhaust guides
    • Multi angle valve job
    • Angle plugs
    • Sold individually
  • Flo-Tek 407-505 Big Block Chevy Complete Aluminum Cylinder Head, 360cc
    Flo-Tek 407-505 Big Block Chevy Complete Aluminum Cylinder Head, 360cc
    SKU-72255360
    x
                
    • Head is sold individually
    • Stainless swirl polished valves  
    • 2.250” intake valve, 1.880” exhaust
    • 360cc intake runners 
    • 128cc exhaust runners
    • 121cc chambers
    • High performance springs (.600 lift hyd flat tappet)
    • PC seals
    • Hardened locks and retainers
    • 7/16” screw-in studs and guideplates
    • High temp exhaust seats
    • Manganese bronze intake guides
    • Phosphor bronze exhaust guides
    • Multi angle valve job
    • Angle plugs
    • Sold individually
  • Flo-Tek 101505 Assembled S/B Chevy Aluminum Head, Angle Plug
    Flo-Tek 101505 Assembled S/B Chevy Aluminum Head, Angle Plug
    SKU-7222200
    x
                

    You don't sacrifice quality for a low price - get both with a Flo-Tek aluminum cylinder head. This Chevy aluminum head is loaded with high end features like bronze valve guides, Multi angle valve job, and 3/8" screw-in rocker studs with guideplates. These are a pre-1986 design small block Chevy cylinder head.

     


    • Head is sold individually
    • 180cc intake runners
    • 62cc exhaust runners
    • 64cc combustion chambers
    • 2.02" and 1.60" stainless steel valves
    • High performance springs for .550" lift
    • Compatible with most flat tappet camshafts
    • Multi angle valve job
    • Bronze guides
    • 3/8" screw-in studs and guide plates