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BBC Billet Cylinder Heads

AJPE’s Solid Billet Big Block Chevy Cylinder Head…Superior Strength, Durability and Performance, built to fit the extreme BBC environment!

  AJPE Billet Big Block Chevy Cylinder Head

 

AJPE BBC TOP 3-4 nbr 300

Standard Features Include:

  • “Large or Small” port versions available.
  • 111cc or 118cc   Chamber volume
  • 2.190” to 2.350” Intake Valve (11/32 stem diameter)
  • 1.850” to 1.880” Exhaust Valve (11/32 stem diameter)
  • Ductile Iron Intake and Exhaust seats standard. (Copper alloy optional)
  • Steel Valve Guides with Bronze liners standard.
  • Light weight: 38 lbs bare.
  • Machined to accept 1.670 triple springs. (2.100 installed height with +.100 retainer)
  • Fits Standard Big Block Chevy head bolt pattern and lifter layout.
  • Machine for 7/16 head studs with steel hat washers installed.
  • Accepts conventional BBC pistons, headers, valve covers, Rocker arms, & intake manifolds.
  • Exhaust bolt pattern is raised up +.450” over factory location.
  • AJPE header flanges available for 2.375 and 2.500 od. header tubes.
  • Machined to accept 14mm x .750 reach, “Gasket style” 13/16 hex spark plugs.
  • High Strength, Made in the USA 6061-T651 Aluminum Billet material.
  • 100% CNC Ported for AJPE Accuracy, Performance & Consistency.
  • Supplied completely finished ready to assemble out of the box.

 

Optional Features Include:

  • Intake port O-rings.
  • One piece Deck O-rings (“Hoops” available with 4.800 od.)
  • ½” head studs and steel inserts.
  • Copper alloy intake and exhaust seats.

                                                                            

 

.900

.800

.700

.600

.500

.400

.300

.200

2.190 Intake Valve
316cc / 118cc      
4.250 Bore
(#01 program)
 
375
 
 
367
 
 
360
 
 
348
 
 
325
 
 
290
 
 
233
 
 
151
 
2.350 Intake Valve
368cc / 111cc      
4.500 Bore
(#02 program)
 
421
 
 
406
 
 
392
 
 
364
 
 
328
 
 
287
 
 
222
 
 
147
 
2.350 Intake Valve
368cc / 118cc      
4.500 Bore
(#03 program)
 
422
 
 
407
 
 
390
 
 
387
 
 
337
 
 
303
 
 
242
 
 
159
 
1.850 Exhaust Valve
119cc / 118cc      
4.250 Bore
(#01 program)
 
320
 
 
315
 
 
310
 
 
302
 
 
283
 
 
244
 
 
174
 
 
122
 
1.880 Exhaust Valve
130cc / 111cc      
4.500 Bore
(#02 program)
 
329
 
 
322
 
 
315
 
 
305
 
 
291
 
 
249
 
 
175
 
 
118
 
1.880 Exhaust Valve
130cc / 118cc      
4.500 Bore
(#03 program)
 
333
 
 
327
 
 
322
 
 
313
 
 
295
 
 
252
 
 
181
 
 
131
 
 
 
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

All flow tests performed on Super Flow 1020 @ 28”, Exhaust tested w/ 2.375” od. pipe.

 

01J-001-01-118     BBC Small Port Cylinder Head, program #01, 316cc Intake port, 118cc Chambers, 2.190" x 1.850" valve sizes, Iron valve seats, 7/16" head studs with steel head stud inserts (pair)

01J-002-02-111     BBC Large Port Cylinder Head, Program #02, 368cc Intake ports, 111cc Chamber, 2.350" x 1.880" valve sizes, Iron seats, 7/16" head studs with steel head stud inserts. (pair)

01J-003-03-118     BBC Large Port Cylinder Head, Program #03, 368cc Intake ports, 118cc Chamber, 2.350" x 1.880" valve sizes, Iron seats, 7/16" head studs with steel head stud inserts. (pair)