Part # 7223000
Flo-Tek 203505 Small Block Ford Aluminum Cylinder Head
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- Features hardened locks and retainers
- Head is compatible with most flat tappet camshafts
- Includes high-temp exhaust seats and bronze guides
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$449.00
each
On Backorder
This part is Backordered. We currently do not have an estimate when this item will ship.
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Product Summary
289, 302, 351W, Assembled Cylinder Head Style, Aluminum
- Features hardened locks and retainers
- Head is compatible with most flat tappet 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"
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Key Specs
| Cylinder Head Style | Assembled |
| Material Type | Aluminum |
| Finish | Natural |
| Combustion Chamber Volume | 58cc |
| Intake Runner Volume | 180cc |
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Need To Know
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Details
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.
- 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 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
Application
- Recommended Spark Plug: AGSF-32C
- Valve Spring Type: Single w/ Damper
- Valve Spring Application: Hydraulic & Solid Flat Tappet
- 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"
- Intake
Specs
- Recommended Spark Plug: AGSF-32C
- 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"
- Intake
Specifications
Specifications
| KEY SPECS | |
|---|---|
| MFG. Part # | 203505 |
| Brand | Flo-Tek |
| Cylinder Head Style | Assembled |
| Material Type | Aluminum |
| Finish | Natural |
| Combustion Chamber Volume | 58cc |
| Intake Runner Volume | 180cc |
| GENERAL | |
| Exhaust Runner Volume | 62cc |
| Combustion Chamber Volume Range | 50cc - 59cc |
| Intake Runner Volume Range | 180cc - 189cc |
| Exhaust Runner Volume Range | 60cc - 69cc |
| Spark Plug Style | Angle |
| Intake Valve Diameter | 1.940" |
| Exhaust Valve Diameter | 1.540" |
| Spring Diameter | 1.470" |
| Notes | Recommended Spark Plug: Motorcraft AGSF-32C or equivalent. Bored for 1/2" head bolts. |
| Sold in Quantity | Each |