Product Summary

Assembled Cylinder Head Style, Aluminum, Natural

  • Has a standard port location for use with most intake and exhaust manifolds
  • Designed for optimal airflow and performance on SBC engines with a 4.0" bore
  • Will flow 232 CFM @ .500" lift on the intake and 173 CFM @ .500" lift on the exhaust
  • Features like fast-burn combustion chambers, high-velocity ports, large diameter valve springs, and rugged construction
  • Large 180cc intake runners, with an improved short-side radius, provide a rush of air into the cylinders, increasing torque
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Key Specs

Cylinder Head StyleAssembled
Material TypeAluminum
FinishNatural
Combustion Chamber Volume64cc
Intake Runner Volume180cc
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Need To Know

Quick and Easy Returns

Return Policy

Flo-Tek 101505 Details

Breathe new life into your small block Chevy with a set of FloTek aluminum cylinder heads from Speedway Motors. If you're looking for a budget-conscious, yet proven, cylinder head for bolt-on performance gains, check out these completely assembled cylinder heads from FloTek. Features like fast-burn combustion chambers, high-velocity ports, large diameter valve springs, and rugged construction make these heads the obvious performance upgrade for small block engines.

FloTek cylinder heads are designed for optimal airflow and performance on SBC engines with a 4.0" bore. Large 180cc intake runners, with an improved short-side radius, provide a rush of air into the cylinders, increasing torque. The key ingredient for big power, however, is the 64cc fast-burn combustion chambers. Air flows in and out of these chambers via a 3-angle valve job. A 62cc exhaust runner gets the spent gasses out. All told, these heads will flow 232 CFM @ .500" lift on the intake and 173 CFM @ .500" lift on the exhaust.

FloTek aluminum cylinder heads arrive packed full of standout features at an incredible value. At 20 lbs. apiece, the state-of-the-art aluminum alloy casting is a great base for any mild SBC build. FloTek cylinder heads are built with bronze valve guides, high nickel valve seats, milled and drilled ends for accessory bracket mounting, and are available in straight or angle spark plug configurations. Assembled heads add stainless valves, 1.46" diameter springs, chromoly retainers, Viton seals, pushrod guide plates, and 3/8" screw-in rocker studs - for a complete bolt-on performance package!

Maybe you are a bit more involved in your engine build - no problem! Pick up a set of bare FloTek heads, also available with straight or angled plugs, to build out with the valves, springs, and hardware of your choice.

Features

  • Heads are sold EACH
  • Standard port location for use with most intake and exhaust manifolds
  • 180cc intake port volume
  • 62cc exhaust port volume
  • 64cc fast-burn combustion chambers deliver big power
  • 2.02” intake/1.60” exhaust valves
  • 3-angle valve job enhances flow at low-to-mid lifts
  • Swirl polished & undercut stainless steel valves
  • Intake flows 232 CFM @ .500” lift
  • Exhaust flows 173 CFM @ .500” lift
  • Accepts both perimeter and center bolt valve covers
  • Single 1.46” diameter valve springs w/ inner damper
  • Suitable for flat tappet camshafts up to .550” lift
  • 7 degree lightweight chromoly retainers and keepers
  • Hardened steel spring cups for durability
  • High nickel powdered metal valve seats provide optimum heat transfer and wear characteristics
  • Manganese bronze valve guides reduce friction
  • Valve guides are compatible with all common valve materials and fuels
  • Viton positive valve seals
  • 2-piece hardened steel pushrod guide plates for use with hardened pushrods
  • 3/8” chromoly screw-in rocker arm studs included
  • Blocked exhaust heat riser manifold crossover port
  • 3/8” NPT coolant temperature probe port
  • Designed for 4" bore small block Chevy engines (302/327/350/383)

Application

These fully assembled heads are ready to run and are a great match to flat tappet camshafts. They're compatible with solid (mechanical) flat tappet or hydraulic flat tappet cams with up to .550” lift. The valve springs (single with flat wire inner damper) have a seat pressure of 130 lbs. Valves are +.100" long and must be used in conjunction with aftermarket aluminum roller rocker arms to clear valve springs used which are 1.46" diameter. The valve springs have 130 lbs. @ 1.750" installed height and 310 lbs. of open pressure at 1.25” (coil bind is at 1.160”).

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.

Flo-Tek 101505 Specifications

KEY SPECS
MFG. Part #101505
BrandFlo-Tek
Cylinder Head StyleAssembled
Material TypeAluminum
FinishNatural
Combustion Chamber Volume64cc
Intake Runner Volume180cc
GENERAL
Exhaust Runner Volume62cc
Combustion Chamber Volume Range60cc - 69cc
Intake Runner Volume Range180cc - 189cc
Exhaust Runner Volume Range60cc - 69cc
Spark Plug StyleAngle
Intake Port ShapeRectangle
Exhaust Port ShapeSquare
Intake Valve Diameter2.02"
Exhaust Valve Diameter1.6"
Spring Diameter1.46"
Stud Diameter0.38"
Sold in QuantityEach

Ratings & Reviews

4.9

9 Reviews

Overall Assessment

Customers are satisfied with our product, noting its high power, improved sounds, and easy installation. The product's lightweight profile contributes to its practicality. It performs excellently, increasing power, and enhancing look on cars. A few comments, however, highlighted a need to double-check the valve clearance before installation. Users recommend our product for its features and affordability, making it a preferred choice over competitors.

4.9

9 reviews

5

8

4

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i think these be good heads

5.0

7 months ago

junkyard dog

dickson,tn

Verified

i have only installed head and run motor on engine run stand runs good but have not installed in car yet it be few months before i get car ready to run on street

Would Recommend

Great product, will be buying more

5.0

2 years ago

Jeff

Rochester, NY

Verified

These heads were well worth the money. They do work well with any 4" bore small block Chevy just as advertised.

Would Recommend

Great product

5.0

4 years ago

Randy

Murfreesboro Tn

Verified

Works great Gave me the power I wanted

Would Recommend

Great

5.0

5 years ago

mdean

Mesa Az.

Verified

Very good set of heads for my small block Chevy.

Would Recommend

I wld buy these again so far so good

5.0

6 years ago

Slim

Wautoma wi

Verified

Made my exhuast sound even better cant wait to get so different mufflers

Would Recommend

Great heads for the price

4.0

6 years ago

Tyler

Omaha NE

I purchased a complete set. I did a valve leak test prior to install. Both heads had 1 intake valve that did not seat well and had a huge leak. Had to disassemble and clean/lap every valve. I did installed these heads on my 350 running in my boat. The weight reduction alone Is amazing. Overall I'm happy with the heads but always double check valve clearance and and piston yo head clearance before you install.

Would Recommend

Flo Tec Heads

5.0

8 years ago

Bob

St. Cloud Florida

Verified

They Look good and run Grete on my motor

Would Recommend

Excellent product

5.0

11 years ago

Thepunisher67

Lithia fl, USA

Verified

The heads bolted on with ease and perform excellent. I bolted them on my son's 67 pro street nova. The car has more power, runs cooler, and looks great. He is smiling every time he starts the car. Thanks for a great product and affordable price.

Would Recommend

great product

5.0

11 years ago

brendaangls

Undisclosed

Verified

just what i wanted and it arrived exactly when it was suppossed to.

Would Recommend

Showing 9 of 9 reviews

Questions & Answers

47 Questions • 12 Answers

Hello, I have a stock 267 that came out of 1980 caprice. Are these compatible?

by Mariano Acevedo

• 2 years ago

1 answer

When torquing the rocker studs does thread sealant need to be used on them as well?

by Scott

• 2 years ago

1 answer

Does these head have accessories hole ?

by Buck

• 6 years ago

1 answer

I have FLOTEK 101-505FT heads that have adjustable push rod guide plates, do they have to be welded after they are adjusted and bolted tight?

by Tim K

• 7 years ago

1 answer

What is the max hp on these heads with a Comp Cam with 270 duration with a 470 lift. And a Holley 750 carburetor and a Holley Dominator intake manifold. With a stock bottom in 350?

by James

• 7 years ago

1 answer

What head stud kit can I use with FLO-TEK 101505 heads? Would ARP 134-4001 Pro Series Cylinder Head Stud Kit work?

by Timothy

• 7 years ago

1 answer

What pushrods would you recommend?

by Jacob

• 7 years ago

1 answer

Will these heads work on a 68 327 bored .40 over ,what compression be with flattop pistons what hp be with a comp cam xe 268

by Kelly

• 7 years ago

3 answers

What's the largest lift cam for the valve springs on these heads

by Mike

• 8 years ago

1 answer

can you use stock head bolts with these heads or do they require aftermarket studs or bolts?

by Felix

• 8 years ago

1 answer

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Fitment

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  • Gen 1 L82 Small Block Chevy

  • 2-Piece Rear Main Chevy 350

  • Gen 1 L46 Small Block Chevy

  • Gen 1 L48 Small Block Chevy

  • Gen 1 L65 Small Block Chevy

  • Gen 1 L81 Small Block Chevy

  • Gen 1 L82 Small Block Chevy

  • Gen 1 L46 Small Block Chevy

  • Gen 1 L48 Small Block Chevy

  • Gen 1 L65 Small Block Chevy

  • Gen 1 L81 Small Block Chevy

  • Gen 1 L82 Small Block Chevy

  • Gen 1 L46 Small Block Chevy

  • Gen 1 L48 Small Block Chevy

  • Gen 1 L65 Small Block Chevy

  • Gen 1 L81 Small Block Chevy

  • Gen 1 L82 Small Block Chevy

  • Gen 1 L46 Small Block Chevy

  • Gen 1 L48 Small Block Chevy

  • Gen 1 L65 Small Block Chevy

  • Gen 1 L81 Small Block Chevy

  • Gen 1 L82 Small Block Chevy

  • Gen 1 L46 Small Block Chevy

  • Gen 1 L48 Small Block Chevy

  • Gen 1 L65 Small Block Chevy

  • Gen 1 L81 Small Block Chevy

  • Gen 1 L82 Small Block Chevy

  • 2-Piece Rear Main Chevy 350

  • Gen 1 L46 Small Block Chevy

  • Gen 1 L48 Small Block Chevy

  • Gen 1 L65 Small Block Chevy

  • Gen 1 L81 Small Block Chevy

  • Gen 1 L82 Small Block Chevy

  • Gen 1 L46 Small Block Chevy

  • Gen 1 L48 Small Block Chevy

  • Gen 1 L65 Small Block Chevy

  • Gen 1 L81 Small Block Chevy

  • Gen 1 L82 Small Block Chevy

  • Gen 1 L46 Small Block Chevy

  • Gen 1 L48 Small Block Chevy

  • Gen 1 L65 Small Block Chevy

  • Gen 1 L81 Small Block Chevy

  • Gen 1 L82 Small Block Chevy

  • Gen 1 LM1 Small Block Chevy

  • Gen 1 L69 Small Block Chevy

  • Gen 1 L76 Small Block Chevy

  • Gen 1 L46 Small Block Chevy

  • Gen 1 L76 Small Block Chevy

  • 350 Chevy Small Block V8

  • 350 Chevy Small Block V8

  • 350 Chevy Small Block V8

  • 350 Chevy Small Block V8

  • 305 Chevy Small Block V8

  • 2-Piece Rear Main 305 LB9

  • 2-Piece Rear Main 305 LG4

  • Gen 1 L69 Small Block Chevy

Customer Impersonation Script