Flo-Tek 203505 Single Small Block Ford SBF 289 302 Aluminum Cylinder Head 58cc

Description

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"
Flo-Tek 203505 Small Block Ford Aluminum Cylinder Head
Sku # 7223000
Mfr. Part # 203505
Condition
New
Brand
Flo-Tek
Sold
Each
Details
Notes
These Flo-
tek
aluminum heads are the answer to the performance enthusiast and work on the small block Fords including the later EFI series when used in conjunction with an aftermarket intake, carb, and camshaft. Aluminum heads allow for a higher compression ratio than cast heads without creating pre-ignition problems. Check your piston usage with the 58cc combustion chamber for accurate ratio computation.
If using the heads on a 289 or 302 the upper row is 80 pounds net and the lower is 70 pounds. Torqued in stock sequence and increments. If using on the 351 with the larger bolts it is 100 pounds net torque in same sequence and increments as stock.
The head uses 3/8 rocker studs 915-99156 and requires the use of adjustable rocker arms like our part number: 915-11772. You will need to check your push rod length to determine the correct length before ordering pushrods.
Depending on the how much extra lift you are going to go with, you may also need different valve spring retainers that allow for more valve spring installed height
289 & 302 engines with 7/16” head bolts use 1012543708. 351W engine with ½” head bolts use 590HBK35100.
These Flo-Tek aluminum heads for the small block Ford are specified to take plug number AGSF-32C
Valve springs are suitable for most hydraulic flat tappet and mild street hydraulic roller camshafts
Info
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
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"
Application
This Part Fits
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"
California Customers: This part has been identified as emissions sensitive and can only legally be installed on race-use only vehicles, off-road-use only vehicles, or pre-1965 vehicles in the State of California in accordance with the California Air Resource Board (CARB) requirements. Once your order is placed you will be contacted by Speedway Motors within 2 business days so that you can certify that you will only use such parts on these types of vehicles in California.
Specs
Material Type
Aluminum
Sold in Quantity
Each
Finish
Natural
Cylinder Head Style
Assembled
Spark Plug Style
Angle
Combustion Chamber Volume
58cc
Notes
Recommended Spark Plug: Motorcraft AGSF-32C or equivalent. Bored for 1/2" head bolts.
MFG. Part #
203505
Intake Valve Diameter
1.940
Intake Runner Volume Range
180cc - 189cc
Exhaust Runner Volume Range
60cc - 69cc
Combustion Chamber Volume Range
50cc - 59cc
Exhaust Runner Volume
62cc
Intake Runner Volume
180cc
Exhaust Valve Diameter
1.540
Spring Diameter
1.470
Reviews
Perfect for my project!
Rated
by Adrian on May 15, 2020
Summary:
I've been wanting to try Flotek for a while and finally the right project/need came along. Did not disappoint at all. Excellent value for an excellent casting assembled very well with quality components. Perfect for a solid street build. Very similar to Ford's aluminum GT40s from back in the day.
Pros:
Excellent build quality
Good Value
Yes, I recommend this product.
Decent aluminum head for short money.
Rated
by Walt on December 30, 2019
Summary:
would prefer smaller intake runner
Yes, I recommend this product.
I found a new go-to company for parts!
Rated
by Dragon on October 20, 2019
Summary:
This baby was fully built and ready to go!
Yes, I recommend this product.
I would by this product again
Rated
by 94Cobra on October 10, 2018
Summary:
I rebuilt my 94 cobra with these heads and an e303 cam and they seem to flow very good.I had a hard time aligning the the roller tip to the valve, at first I thought it was rocker stud not alining with valve tip, until I noticed How much side play my rockers had and thus not staying centered on valve. the fix was too shim the trunnion on the rockers.
Pros:
Nice heads for the price
Yes, I recommend this product.
Checked great right out of the box
Rated
by Lance on April 01, 2018
Summary:
Worked great valves were solid with no leak by has a small amount of casting marks in the ports so an easy clean up and guide plates were nice being adjustable. On the downside the rocker studs are too short to be used with the height of the valve stems but overall very pleased with the quality
Yes, I recommend this product.
Related Items / Suggested Parts
ARP 254-3708 Ford 302 w/ 351 Windsor Aluminum Cylinder Heads Bolt Kit
Fel-Pro 1011-1 1962-1984 Small Block Ford Head Gasket
Fel-Pro 1250 Small Block Ford Intake Gasket Set-1.20x2.00 Port
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About
Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 69 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.
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