285cc BBF "Bullitt" 14° Street Head
AFR`s 285cc heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. Recommended for more aggressive or street/strip or racing builds with displacements up to 512 cubic inches, operating up to 6500 RPM.
Application specific pistons or fly cutting of your current pistons are required due to the revised valve locations and angles of the AFR Bullitt heads.
285cc Fully CNC Ported BBF
Tested on 4.390 Bore
285cc Fully CNC Ported BBF w/ .250 raised Exhaust
Tested on 4.390 Bore
Included Components
100% CNC Ported Combustion Chambers
100% CNC Ported Intake & Exhaust
Competition 5-Angle Valve Job
AFR #755111/32" Bead Lock Intake Valve 2.250" x 5.250" O.A.L
AFR #755311/32" Bead Lock Tulip Exhaust Valve 1.760" x 5.050" O.A.L
AFR #8031PAC Racing #1224 1.625" OD Solid Roller Dual Valve Spring 275 lbs. on seat, .850" maximum lift, Max RPM 7400-7600 Uses #8518 Steel Retainer & #8046 Spring Cup (upgrades available)
AFR #851810° Manley Steel Retainers 1.500" O.D x 1.168" I.D x .844" I.D
AFR #8002PAC Racing #1940 1.550" OD Hydraulic Roller Dual Valve Spring 175 lbs. on seat, .725" maximum lift Max RPM 6500-6700; Uses #8511 Steel Retainer
AFR #851110° Manley Steel Retainers 1.500" O.D x 1.120" I.D x .705" I.D
AFR #901010° 11/32" Beadlock Valve Keepers with lashcap recess
AFR #6407ARP 7/16" Rocker Studs Intake
AFR #6108Adjustable 3/8" Guide Plates
AFR #661111/32" Viton Valve Seals
AFR #8048Hardened Valve Spring I.D Locator 1.550" O.D x .780" I.D
AFR #9065Intake Valve Seats 2.450" O.D x 1.950" I.D x .375" Deep
AFR #9066Hardened Valve Spring I.D Locator 1.550" O.D x .780" I.D
AFR #904611/32" Bronze Valve Guides .531" O.D x 2.250" O.A.L
Specifications & Features:
A356 AluminumMaterial
285ccIntake Port Volume
2.275" H x 1.850" W x .575 RadiusIntake Port Dimension
StockIntake Port Location
142ccExhaust Port Volume
1.850"H x 1.600"WExhaust Port Dimension
Stock or .250" RaisedExhaust Port Location
75cc or 88ccCombustion Chamber Size
Perimeter BoltValve Cover Bolt Pattern
14° Intake/8° ExhaustValve Angle
1.750" O.DValve Spring Pocket Diameter
1.750" O.DMax Valve Spring Pocket Machining
.750"Deck Thickness
4.360"Minimum Bore Diameter
3.275 sq. in. Minimum Cross Sectional Area
14mm x .750" w/Gasket SeatSpark Plug Dimensions
Recommended Components:
AFR #6893Intake Port Gasket
Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit AFR heads.
AFR #6891Exhaust Port Gasket, Fel-Pro #1420
AFR #6892Head Gasket, 4.500 Bore, Fel-Pro #1018
AFR #6340Head Bolts, ARP #155-3603
AFR #6341Head Studs, ARP# 155-4202 12 Point
AFR #6320Head Bolt Washers, Manley
AFR #6209Stud Girdle
AFR Single Plane, AFR# 4992 or 4993Suggested Manifold
Autolite 3932Spark Plug Starting Range