AFR cylinder head logo

AFR Cylinder Heads
BBF 270cc-285cc-300cc runner
Cylinder Heads

AFR Aluminum Performance 14° BBF Cylinder Heads

BBF 270cc Cylinder Heads--BBF 270cc runner listing and pricing--
BBF 285cc Cylinder Heads--BBF 285cc runner listing and pricing--
BBF 300cc Cylinder Heads--BBF 300cc runner listing and pricing--

click AFR cylinder head pic to see listings
afr bbf cylinder head

*--NOTE: the AFR 270cc, 285cc and 300cc runner BBF heads do require a "custom piston" for the new 14° Intake valve angle and the 8° Exhaust valve angle along with the moved valve location that the AFR BBF heads are currently using--All major piston companies have blueprints to build pistons for the AFR BBF heads--
*--If you’re looking for the best flowing economical entry level Big Block Ford head for your 460 or larger cu in applications, look no further--
*--partially CNC ported 270cc is available with 75cc or 88cc combustion chambers that are 50% CNC ported-int and exh ports have an 80% CNC bowl blend with an intake gasket match-2.250/1.760 valves--
*--285cc runner cylinder heads are 100% cnc ported, equipped with 2.250/1.760 valves, with a choice of 75cc or 88cc chambers and either a stock location exh port or .250 raised exh port for better exh flow--
*--300cc runner cylinder heads are 100% cnc ported, equipped with 2.250/1.760 valves, with a choice of 75cc or 88cc chambers and either a .250 raised exh port or .625 raised exh port location--
*--view AFR BBF Cylinder Head Flow Charts--
*--standard with 7/16 rocker stud and adjustable guide plates (that will require hardened push rods), Manley 10° retainer, choice of hydraulic roller or Pacaloy solid roller valve springs--great tech help @ www.airflowresearch.com

see BBF Head Cylinder Head Options for valve spring upgrades-
If you need assistance in selecting the best AFR cylinder head for your application, you may want to e-mail support@dfperformance.com a description of your combination and we'll see if we can help out.

ups logo credit card logo

FREE ground SHIPPING inside the continental USA on purchases over $2900.00--allow about 2-3 weeks for Cylinder Head orders to ship--

Don't forget to join us onFacebook logo our facebook page



BBF 270cc go to
BBF 285cc
go to
BBF 300cc
go to
Flow Charts
go to
BBF Head Options
Top
afr lsx cylinder headAFR BBF 270cc runner Street Cylinder Head Specifications
combustion chambers are 50% CNC ported-int and exh ports have an 80% CNC bowl blend with an intake gasket match--spring seat pressure of 175lbs and open pressure of 430lbs are for the hyd roller cams--Note:maximum lift is .725)-also note that Intake manifolds other than AFR’s may need to be modified and may still not properly fit AFR’s port entry-for manifold choices and spring upgrades see   BBF Cyl Head Options
--spring pockets are cut to 1.750 OD and use a spring cup--

see    BBF 270cc runner Flow Charts
cc exh port
location
part # v/dia. runner
cc
spring retainer seat pressure open pressure max. lift price/pair buy
75
cc
stock 3801 --- 270 Bare heads have full cnc port/comp valve job $1817.78
3802 2.250/1.760 270 1.550 steel 175lbs 430lbs .725 $2036.03
3803 2.250/1.760 270 1.550 steel 220lbs 605lbs .700 $2110.72
88
cc
stock 3804 --- 270 Bare heads have partial cnc port/comp valve job $1817.78
3805 2.250/1.760 270 1.550 steel 175lbs 430lbs .725 $2036.03
3806 2.250/1.760 270 1.550 steel 220lbs 605lbs .700 $2110.72
parts incl. w/270cc Heads part # some suggestions
11/32 Intake Valve 2.25 x 5.250 Oal AFR #7551 Cyl Head Bolt/Stud torque w/moly--140lbs
11/32 Exhaust Valve 1.760 x 5.050 Oal AFR #7553 Cyl Head Stud torque w/moly--
Mech Roller Spring-1.550 220/605lbs @ .700 lift-see spring upgrades AFR #8000 Rocker stud Torque--------55lbs
Hyd Roller Spring-1.550 175/430lbs AFR #8002 Int Gasket(2.23x1.815)--AFR #6893
Manley 10° Chrome Moly Retainer AFR #8511 Exh Gasket--AFR#6891 or FP#1420
Bead Lock 10° valve keepers AFR#9010 Head Bolts ARP#155-3603--Head Studs ARP #155-4201(12pt)--
Adjustable Guide Plates-5/16 #6108 Stud Girdle --AFR #6209--
11/32 Viton Valve Seals #6611 Suggested Intake Manifolds-AFR Single plane #4992 or #4993
Rocker Stud-7/16 #6407 Starting spark plug--Autolite 3932 (14mm x .750 w/gasket seat)
Hardened Spring Cup #8048 (Int and Exh) valve angle 14° Intake/8° Exhaust
Intake Valve Seats #9065 Valve Spring dia 1.750 OD--no larger
Exhaust Valve Seats #9066 Minimum bore diameter required--4.390
Bronze Valve Guides-(Int and Exh) #9046 angle mills may require .120 intake gasket
go to
BBF 270cc
BBF 285cc go to
BBF 300cc
go to
Flow Charts
go to
BBF Head Options
Top
afr lsx cylinder headAFR BBF 285cc runner Street Cylinder Head Specifications
Choice of exh port in stock location or raised .250-Full 100% cnc port--spring seat pressure of 175lbs and open pressure of 430lbs are for the hyd roller cams--also note that Intake manifolds other than AFR’s may need to be modified and may still not properly fit AFR’s port entry-see   BBF Cyl Head Optionsfor manifold choices
--spring pockets are cut to 1.75 OD and use a spring cup--

see    BBF 285 cc runner Flow Charts
cc exh port
location
part # v/dia. runner
cc
spring retainer seat pressure open pressure max. lift price/pair buy
75
cc
stock 3815 --- 285 Bare heads have full cnc port/comp valve job $2228.09
3816 2.250/1.760 285 1.550 steel 175lbs 430lbs .725 $2446.36
3817 2.250/1.760 285 1.625 steel 275lbs 750lbs .850 $2521.03
88
cc
stock 3818 --- 285 Bare heads have full cnc port/comp valve job $2228.09
3819 2.250/1.760 285 1.550 steel 175lbs 430lbs .725 $2446.36
3820 2.250/1.760 285 1.625 steel 275lbs 750lbs .850 $2521.03
75
cc
raised.250 3821 --- 285 Bare heads have full cnc port/comp valve job $2422.09
3822 2.250/1.760 285 1.550 steel 175lbs 430lbs .725 $2640.34
3823 2.250/1.760 285 1.625 steel 275lbs 750lbs .850 $2715.03
88
cc
raised.250 3824 --- 285 Bare heads have full cnc port/comp valve job $2422.09
3825 2.250/1.760 285 1.550 steel 175lbs 430lbs .725 $2640.34
3826 2.250/1.760 285 1.625` steel 275lbs 750lbs .850 $2715.03
parts incl. w/285cc Heads part # some suggestions
11/32 Intake Valve 2.25 x 5.250 Oal AFR #7551 Cyl Head bolt/stud torque w/moly--140lbs
11/32 Exhaust Valve 1.760 x 5.050 Oal AFR #7553 Exh port location--stock or .250 raised
Mech Roller Spring-1.550 275/750lbs @.750 lift--.850 max lift AFR #8031 Rocker stud Torque--------55lbs
Manley 10° Chrome Moly Retainer for Mech roller AFR #8518 Exh Gasket--AFR#6891 or FP#1420
Hyd Roller Spring-1.550 175/---lbs .725 max lift AFR #8002 Int Gasket(2.23x1.815)--AFR#6893
Manley 10° Chrome Moly Retainer for Hyd roller AFR #8511 Head Gasket 4.500 bore Fel Pro #1018 -AFR #6892
Bead Lock 10° valve keepers AFR#9010 Head Bolts ARP#155-3603--Head Studs ARP #155-4201(12pt)--
Adjustable Guide Plates-5/16 #6108 Stud Girdle --AFR #6209--
11/32 Viton Valve Seals #6611 Suggested Manifolds-AFR Single plane #4992(4150 flange)or#4993(4500 flange)
Rocker Stud-7/16 #6407 Starting spark plug--Autolite 3932 (14mm x .750 w/gasket seat)
Hardened Spring Cup #8048 (Int and Exh) valve angle 14° Intake/8° Exhaust
Intake Valve Seats #9065 Valve Spring dia 1.750 OD--no larger
Exhaust Valve Seats #9066 Minimum bore diameter required--4.390
Bronze Valve Guides-(Int and Exh) #9046 angle mills may require .120 intake gasket
go to
BBF 270cc
go to
BBF 285cc
BBF 300cc go to
Flow Charts
go to
BBF Head Options
Top
afr lsx cylinder headAFR BBF 300cc runner Street Cylinder Head Specifications
Choice of exh port raised .250(1/4") or .625(5/8")-100% full cnc port--spring seat pressure of 175lbs and open pressure of 473lbs are for the hyd roller cams---also note that Intake manifolds other than AFR’s may need to be modified and may still not properly fit AFR’s port entry-see   BBF Cyl Head Options for manifold choices
--spring pockets are cut to 1.750 and use a hardened spring cup --

see    BBF 300 cc runner Flow Charts
cc exh port
location
part # v/dia. runner
cc
spring retainer seat pressure open pressure max. lift price/pair buy
75
cc
raised .250 3833 --- 300 Bare heads have full cnc port/comp valve job $2519.09
3834 2.250/1.760 300 1.550 steel 175lbs 430lbs .725 $2737.34
3835 2.250/1.760 300 1.550 steel 275lbs 750lbs .850 $2812.03
88
cc
raised .250 3836 --- 300 Bare heads have full cnc port/comp valve job $2519.09
3837 2.250/1.760 300 1.550 steel 175lbs 430lbs .725 $2737.34
3838 2.250/1.760 300 1.550 steel 275lbs 750lbs .850 $2812.03
75
cc
raised .625 3839 --- 300 Bare heads have full cnc port/comp valve job $2623.00
3840 2.250/1.760 300 1.550 steel 175lbs 430lbs .725 $2826.00
3841 2.250/1.760 300 1.550 steel 275lbs 750lbs .850 $2909.00
88
cc
raised .625 3842 --- 300 Bare heads have full cnc port/comp valve job $2623.00
3843 2.250/1.760 300 1.550 steel 175lbs 430lbs .725 $2826.00
3844 2.250/1.760 300 1.550 steel 275lbs 750lbs .850 $2909.00
parts incl. w/300cc Heads part # some suggestions
11/32 Intake Valve 2.25 x 5.250 Oal AFR #7551 Cyl Head stud/bolt torque w/moly--140lbs
11/32 Exhaust Valve 1.760 x 5.050 Oal AFR #7553 Exh port location--.250 raised or .625 raised
Mech Roller Spring-1.625 275/750lbs @.750lift--.850 max lift AFR #8031 Rocker stud Torque--------55lbs
Manley 10° Chrome Moly Retainer for Mech roller AFR #8518 Exh Gasket--AFR#6891 or FP#1420
Hyd Roller Spring-1.550 175/---lbs .725 max lift AFR #8002 Int Gasket(2.23x1.815)--AFR#6893
Manley 10° Chrome Moly Retainer for Hyd roller AFR #8511 Head Gasket 4.500 bore Fel Pro #1018 -AFR #6892
Bead Lock 10° valve keepers AFR#9010 Head Bolts ARP#155-3603 (6 pt)--Head Studs ARP #155-4203(12pt)--
Adjustable Guide Plates-5/16 #6108 Stud Girdle --AFR #6209--
11/32 Viton Valve Seals #6611 Suggested Manifolds-AFR Single plane #4992(4150 flange)or#4993(4500 flange)
Rocker Stud-7/16 #6407 for the Intake and #6406 for the Exh. Starting spark plug--Autolite 3932 (14mm x .750 w/gasket seat)
Hardened Spring Cup #8048 (Int and Exh) valve angle 14° Intake/8° Exhaust
Intake Valve Seats #9065 Valve Spring dia 1.750 OD--no larger
Exhaust Valve Seats #9066 Minimum bore diameter required--4.390
Bronze Valve Guides-(Int and Exh) #9046 angle mills may require .120 intake gasket
go to
BBF 270cc
go to
BBF 285cc
go to
BBF 300cc
Flow Charts go to
BBF Head Options
Top
AFR BBF 270cc runner Cylinder Head Flow Chart-4.390 bore-cfm @28" H2O
valve size .200 .300 .400 .500 .600 .650 ---
2.25 int. 169 244 309 354 385 390 ---
1.760 exh. 130 174 214 238 254 260 ---
AFR BBF 285cc runner Cylinder Head Flow Chart-4.390 bore-cfm @28" H2O
valve size .200 .300 .400 .500 .600 .650 .700
2.25 int. 168 245 313 357 396 404 411
1.76 exh. std location 128 175 218 249 267 273 276
1.76 exh. raised .250 127 172 218 252 274 279 284
AFR BBF 300cc runner Cylinder Head Flow Chart-4.500 bore-cfm @28" H2O
valve size .200 .300 .400 .500 .600 .700 .750
2.25 int. 162 241 309 360 405 423 427
1.76 exh. raised .250 127 172 218 252 274 284 284
1.76 exh. raised .625 129 178 226 260 284 296 298
go to
BBF 270cc
go to
BBF 285cc
go to
BBF 300cc
go to
Flow Charts
go to
BBF Head Options
Top
the AFR BBF Cylinder Head Options listed below
may only be ordered along with a complete set of AFR Cylinder Heads--
--keep in mind, free shipping for purchases totaling $2900.00 or more for USA zipcodes--
Item description price buy
titanium retainer --AFR upgrade #8508--10° Titanium Retainers installed in place of the steel retainers that are normally supplied $190.12
valve spring --AFR #8062 spring upgrade for the 270cc Runner Head exchanges spring #8000 for the heavier #8031 valve spring for solid roller cams w/275lbs seat pressure and 750lbs @.750 lift with a max lift of .850 $133.86
bbf 4150 intake manifold --AFR #4992 --4150 flange intake manifold made by AFR specifically for the AFR BBF Heads $337.56
bbf 4500 intake manifold --AFR #4993 --4500 flange intake manifold made by AFR specifically for the AFR BBF Heads $352.11