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Super Team

AJR-Racing Blaine-Johnson

426 Hemi Stage VII Top Fuel Cylinder Heads

AJPE’s Stage 7 Top Fuel Hemi Cylinder Head…the latest version from their long line of championship winning Hemi cylinder head designs!

  AJPE  Stage 7 Top Fuel 426 Hemi Head

 

Standard Features Include:

  • 200cc  Chamber volume (4.187 bore)
  • 2.470” Intake Valve (11/32 stem diameter)
  • 1.925” Exhaust Valve (3/8 stem diameter)
  • Copper alloy intake seats and Ductile Iron Exhaust seats standard.
  • Steel Valve Guides with Bronze liners standard.
  • AJPE designed exhaust guide “shoe” to eliminate exhaust guide movement.
  • Dual spark plugs and down nozzles standard.
  • “Tubeless” Intake port design: no pushrod tubes to leak or fail.
  • Optional Counterbored Top Row
  • Added 7/16 Rocker Stand studs located above and below the rocker shafts for greater rocker assembly stiffness.
  • Captured Fuel Rails to prevent oil leaks under crank case pressurization
  • Revised Exhaust Flange and bolt pattern to improve header sealing and serviceability.
  • Deck O-rings: One piece “Jr Hoops” with .025 protrusion (No wires to fail or fall out)
  • Fits Standard and -.500 short deck blocks with 1.900” lifter spread
  • High Strength, Made in the USA 6013-T651 Aluminum Billet material.
  • 100% CNC Ported for AJPE Accuracy, Performance & Consistency.
  • Supplied completely finished ready to assemble out of the box.

 

 
 
.800
 
 
.700
 
 
.600
 
 
.500
 
 
.400
 
 
.300
 
 
.200
 
2.470 Intake Valve
340cc
4.187 Bore
 
570
 
 
528
 
 
467
 
 
390
 
 
312
 
 
237
 
 
147
 
1.925 Exhaust Valve
149cc
4.187 Bore
 
404
 
 
386
 
 
354
 
 
308
 
 
249
 
 
189
 
 
133
 

 

 

 

 

 

 

 

All flow tests performed on Super Flow 1020 @ 28”, Exhaust tested w/ 2.750” od. pipe.

 

01A-007     Stage 7 Top Fuel 2.470 x 1.925" valve diameter, Copper Intake valve seats, Ductile Iron Exhaust seats, 9/16" HB Inserts  & .025" Jr. Hoops, Standard Top Row head studs. (pair)

01A-007-CB     Stage 7 Top Fuel 2.470 x 1.925" valve diameter, Copper Intake valve seats, Ductile Iron Exhaust seats, 9/16" HB Inserts  & .025" Jr. Hoops, Counterbored Top Row head studs. (pair)