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AFR Cylinder Heads
Big Block Chevy 265cc Oval Port Cylinder Heads
BBC Performance Street/Strip Cylinder Heads

with new 2016 pricing

AFR BBC 265cc high velocity oval port provides bottom end torque for smaller cubic inch BBC street/strip performance applications

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afr cylinder head

*--click here to see cylinder head listings--
*--2.19/1.880 one piece stainless valves with 10° locks and hardened spring seats are standard--
*--choice of 109cc (50% CNC'd) or 112cc (100% CNC'd) combustion chamber volumes--
*--choice of 1.550 hydraulic roller springs or 1.550 mechanical roller springs--
*--suggested manifold: edel Vic Jr-RPM Performer and intake gasket: GM#12366985--
*--exhaust ports and bolt pattern are raised .375 (3/8”) over stock location, this rearly affects header or chassis fitment--
*--40% CNC Ported Exhaust Ports (Bowl Blend)-50% CNC Chambers for the 109cc chamber heads and 100%CNC chamber for the 112cc heads-80% CNC Ported Intake Ports (Bowl Blend) & Gasket Port Match--
*--see basic parts list and some suggestions on manifolds and gaskets--
*--A 3/4” thick head deck makes the AFR head ideal for nitrous or blower applications--great tech help @ www.airflowresearch.com--

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 or call 856-767-4095 or 856-767-7740, and we'll see if we can help out.

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FREE ground SHIPPING inside the continental USA on purchases over $2900.00--allow about 2-3 weeks for Cylinder Head orders to ship--
check out BBC Cylinder Head Options to add a few items you may need--

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BBC 265cc Oval Port go to
Flow Charts
go to
BBC Head Options
Top
afr bbc cylinder headAFR BBC 265cc Oval Port Cylinder Head
AFR’s 265cc Big BLock Chevy head is perfect for 396-454cuin engines with the small but high velocity oval shaped runner providing tremendous throttle speed--always check for piston to chamber interference w/o a head gasket before final assembly (the chamber shape is very critical to flow and shouldn't be altered so contact material should be removed from the dome,if necessary)--   see basic parts list for parts included in head assembly and some suggestions on manifolds and gaskets--- --
Important: Hyd. roller springs will have 170/473lbs spring pressure & Mechanical roller spring will have 225/600lbs spring pressure
cc int shape part # valve/dia. runner
cc
spring retainer seat pressure open pressure max. lift price/pair buy
109
cc
oval 3600 2.190/1.880 265 Bare heads have partial cnc port w/comp valve job $1840.09
3610 2.190/1.880 265 1.550 steel 170 473lbs .650 $2133.03
3620 2.190/1.880 265 1.550 steel 225 600lbs .710 $2158.25
112
cc
oval 3600-1 2.190/1.880 265 Bare heads have partial cnc port w/comp valve job $2047.67
3610-1 2.190/1.880 265 1.550 steel 170 473lbs .650 $2340.61
3620-1 2.190/1.880 265 1.550 steel 225 600lbs .710 $2365.83
go to
BBC 265cc Oval Port
Flow Charts go to
BBC Head Options
Top
AFR 265cc BBC Oval Port Cylinder Head with 100% CNC Chamber (112cc)-note the increased flow at low lifts to help fill the cylinder earlier for even more low end torque tested on 4.310 bore-Flow Chart cfm @28" H2O
valve size .200 .300 .400 .500 .550 .600 .650
2.190 int. 164 238 291 328 335 342 345
1.880 exh. 135 190 230 258 265 274 280
AFR 265cc BBC Oval Port Cylinder Head as listed with 50% CNC Chamber (109cc) tested on 4.310 bore-Flow Chart cfm @28" H2O
valve size .200 .300 .400 .500 .550 .600 .650
2.190 int. 154 218 278 323 339 347 354
1.880 exh. 127 164 200 230 250 255 260
go to
BBC 265cc Oval Port
go to
Flow Charts
BBC Head Options Top
the AFR BBC 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-Titanium 10° Retainers installed in place of the steel retainers that are normally supplied $190.12
valve spring --AFR #8062 valve spring upgrade (only for the Mechanical Roller cams), trades the #8000 spring for the upgraded #8031 (1.625) valve spring for lifts up to .850 w/more spring pressure-275lbs seat pressure-800lbs open pressure with .850 max lift-- $133.86
comp cams ultra pro magnum rocker --Comp Cams ULTRA Pro Magnum Roller Rocker-1.7 ratio-"Lifetime Guarantee" so strong that the body is guaranteed for life against breakage and unlike alum. rockers, rockers can be rebuilt by replacing the trunion, roller tip, and bearings thru Comp Cams- $318.32

the AFR BBC Cylinder Head Basic Package Components are listed below
and a few specifications and suggestions for Supporting Components--
parts incl. w/Heads part # some suggestions
Intake Valve 2.190x5.460 Oal #7601 Cyl Head torque w/moly----75lbs
Exhaust Valve 1.880x5.448 Oal #7630 Rocker Stud Torque--------55lbs
Mech Roller Spring 1.550-225/600lbs AFR #8000 Int Gasket----------GM 12366985
or Hyd roller Spring 1.550 170/473lbs AFR #8002 Exh Gasket----------AFR#6858
Manley 10° Chrome Moly Retainer1.550 AFR#8511 Head Bolts Mark V----ARP#135-3707 or AFR#6308
10° Valve Locks AFR #9005 Head Stud kit-Mark V----ARP#235-4713 or AFR#6307
Viton Valve Seals #6611 Head Bolts Mark IV----ARP#135-3703 or AFR#6306
Hardened Spring Cup #8048 Manifolds------Edel Vic Jr, RPM Performer
Intake Valve Seats #9065 Spark Plugs-----Auto 3935
Exhaust Valve Seats #9064 Stud Girdle----------AFR#6210
Bronze Valve Guides-Intake #9045 spring pocket can be cut to 1.750, but no deeper
Bronze Valve Guides-Exhaust #9046
Intake Rocker Stud-7/16 #6407
Exhaust Rocker Stud-7/16 #6406
Adjustable Guide Plates-3/8 #6109