AFR 2015-TI Big Block Chevrolet 377cc Rectangle Port , 121cc, CNC Bowl Blend & Fully CNC Chamber Ready, Complete W/ Solid Roller Set Up

AFR Feels these are best suited for +540 cubic inch large displacement Big Block Chevrolet racing engines, operating at or below 7600 RPM. Our 377cc cylinder heads feature fully CNC machined intake runners, exhaust ports and combustion chambers.  Equipped with Titanium retainers and high quality components, these heads are capable of flowing 437 CFM at 0.900" of lift.

 Material  : A356 Aluminum

Intake Port Volume  : 377cc

Intake Port Dimension : 2.450" H x 1.755" W x 13/32° Radius

Intake Port  : Stock

Exhaust Port Volume :  135cc

Exhaust Port Dimension  : 1.780"H x 2.025" W

Exhaust Port Location  : .375" Raised

Combustion Chamber Size  : Full CNC 122cc

Valve Cover Bolt  : Pattern Perimeter Bolt

Valve  : Angle 24°/4° Int, 15°/4° Exh

Valve Spring Pocket Diameter  : 1.725" O.D

Max Valve Spring Pocket Machining  : 1.750" O.D

Deck Thickness : .750"

Minimum Bore Diameter  : 4.250"

Flat Mill  :  .006" per cc/ Maximum 114cc CNC Chamber

Angle Mill   : .009" per cc/ Maximum 104cc as cast

Note:Angle mills might require a .120" Thick intake gasket.

Minimum Cross Sectional Area : 3.860 sq. in

Spark Plug Dimensions  : 14mm x .750" w/Gasket Seat

** With some domed aftermarket pistons, it may be necessary to slightly clearance or modify the piston due to there more efficient heart shaped combustion chamber design. Most of the newer designed dome profiles will clear. AFR strongly recommends material be removed from the piston and not the cylinder head. Our combustion chamber shapes are very critical to flow and altering the cylinder head can adversely affect flow and power production. It is the customers responsibility to verify proper piston to head clearance.

*** Heads are designed for 3/8" pushrods.  Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin.

 AFR recommends the use of .120" thick-wall pushrods.

 AFR heads are available bare (without parts), call our tech line (714) 523-0530  for details.