This is where it all started! FLO-TEK’s 180cc Cylinder Head for Small Block Chevrolet. The small block Chevy 180cc cylinder head was the foundation in 2007 for FLO-TEK Performance Heads. Out of the box ready to bolt on. Economically priced!

What matters most? Three things, quality, performance and price! Making FLO-TEK 180 cc small block Chevy head the answer! These are available for 305, 307, 327 & 350. For 400 Motors contact FLOTEK.

The features for the FLO-TEK 180cc include state of the art casting, 180cc intake ports that are specifically designed for outstanding versatility, and 64cc combustion chamber. These are the most affordable high quality aluminum cylinder heads on the market. The FLOTEK Performance Cylinder Heads series are a line of heads designed by Tri-State Cylinder Head for maximum out-of-the-box horsepower. Standard features are aluminum alloy, phosphorous bronze valve guides, high nickel valve seats, ends milled and drilled for accessories, and a straight or angle spark plug.

FLOTEK inspects each shipment of aluminum heads assuring the customer that they are receiving the best product for the money. 100% assembled in the USA!

Push Rods: +.100 Length Push Rods. Use Push Rod length checker to establish correct length.

Up to .550 Lift



Specifications, Features & Optional Supporting Components

Head Bolt Torque50-65-80 Ft-Lb, 75 Ft-Lb on Bottom (Permatex#80631)
Rocker Stud Torque45 Ft-Lb
Intake Port GasketFel Pro 1255 or Equivalent
Exhaust Port GasketFel Pro 1404 or Equivalent
Head Gasket350/383 Fel Pro 1003, Cometic C5399
Head Bolts & StudsARP134-3601, Manley 42313, ARP 134-4001
Head Bolt WashersManley 42102
Suggested ManifoldPerformer RPM Air Gap
Spark Plug Starting RangeNGKR5671A-7/4091 Hotter or Colder or Equivalent
Intake Port Volume180cc
Exhaust Port Volume62cc
Combustion Chambers64cc
Max Spring Pocket Diameter1.560”
Rocker ArmsBlumax SBC Aluminum, 1.5:1 3/8 stud, Must have clearance for Retainers

Basic Package Components:
Intake Valve2.02 + .100
Exhaust Valve1.600 + .100
Valve Spring FTCL120# @ 1.800″, OP#290@1.20″ C/Bind-1.160
Valve SpringCL130# @ 1.75, OP 310# @ 1.25, C/Bind- 1.160
Retainers7 Degree Chrome Moly Retainer
Valve Locks7 Degree Chrome Moly Locks
Rocker Stud3/8” Chrome Moly Rocker Stud 7/16” avail.
GuideplateHardened Steel FLOTEK Two-piece adjustable Guideplate
Valve SealsViton Positive Seals
Spring CupHardened Steel Cups
Intake Valve SeatPowder Metal
Exhaust Valve SeatPowder Metal
Bronze Valve GuidesManganese Bronze

Part Specification

Flo-Tek Cylinder HeadID#Part Number
SBC Angle Bare00850134007044101-500
SBC Straight Bare00850134007013102-500
SBC Angle Assembled00850134007020101-505
SBC Straight Assembed00850134007037102-505
SBC Angle Assembled Flat Tappet00850134007464101-505FT
SBC Straight Assembled Flat Tappet00850134007457102-505FT

Flow Chart


Dimensions & Weight

Small Block Chevy Bare19.8 Pounds
Small Block Chevy Assembled25.8 Pounds


Additional information

Weight 25.8 lbs
Dimensions 22 × 7 × 8.5 in

SBC Angle Bare (101-500), SBC Straight Bare (102-500), SBC Angle Assembled (101-505), SBC Straight Assembed (102-505), SBC Angle Assembled Flat Tappet (101-505FT), SBC Straight Assembled Flat Tappet (102-505FT)