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Stage 8 Locking Header Bolts easy to use and they are real assurance against horsepower loss or gasket failure created by loose nuts or bolts. The unique patented and trademarked functional design is just three pieces: a bolt (4130 Alloy Steel), a locking retainer and a spring clip. The header bolt kits are application specific as either hex head with a 3/16 recessed allen head or 12 point, USA or metric. All Stage 8 Locking Header Bolt Kits are sold with all of the necessary hardware for your application.
STAGE 8 LOCKING HEADER BOLTS NOTE: DHH = DOUBLE HEX HEAD BOLT, INCLUDES 3/16 RECESSED ALLEN HEAD
Application
  
Part #
Pricing
Description
INLINE 6 & 6 CYLINDER        
  Inline 6   6911 $43.89 (8) 3/8-16x1 1/4" bolts 12pt
  V6 With 3/8 Bolts   8911 $58.31 (12) 3/8-16x3/4" bolts 6pt DHH
      8911A $64.80 (12) 3/8-16x1" bolts 6pt DHH
      8931 $58.31 (12) 3/8-16x1" bolts 12pt
      8951 $106.32 (12) 3/8-16x1" bolts 6pt Stainless Steel DHH
  V6 2.8 Liter   6910 $56.39 (12) 8mm-1.25x25mm bolts 6pt DHH
  V6 3.8 Liter   6912 $58.31 (12) 5/16-18x7/8" bolts 6pt DHH
           
8 CYLINDER        
  Small Blocks 265 - 400 cu/in   8911 $58.31 (12) 3/8-16x3/4" bolts 6pt DHH
  (exc. ZR1 and w/Brodix Heads)   8911A $64.80 (12) 3/8-16x1" bolts 6pt DHH
      8911B $64.80 (12) 3/8-16x1 1/4" bolts 12pt
      8931 $58.31 (12) 3/8-16x1" bolts 12pt
      8951 $106.32 (12) 3/8-16x1" bolts 6pt Stainless Steel DHH
  Small Blocks w/ Brodix Heads   8912A $71.83 (16) 3/8-16x1" bolts 6pt DHH
  Small Blocks w/ 8mm bolts   8900 $58.19 (12) 8mm-1.25x25mm bolts 6pt DHH
  LS1,2,6, LM7, 4.8 ,5.3 6.0 Liter   8900 $58.19 (12) 8mm-1.25x25mm bolts 6pt DHH
  ZR1 350 C.I.D.   8908 $70.39 (32) 8mm-1.25x30mm bolts 12pt
  OEM Corvette Headers '84-'95   8907 $60.07 (12) 3/8-16x2" bolts 12pt
  Big Blocks 396 - 502 cu/in   8912 $64.80 (16) 3/8-16x3/4" bolts 6pt DHH
  (exc. 348 & 409)   8912A $71.83 (16) 3/8-16x1" bolts 6pt DHH
      8912B $71.83 (16) 3/8-16x1 1/4" bolts 12pt
      8932 $64.80 (16) 3/8-16x1" bolts 12pt
      8952 $117.36 (16) 3/8-16x1" bolts 6pt Stainless Steel DHH
  Big Blocks 348 & 409 cu/in   8101S $62.47 (14) 3/8-16x1" bolts 6pt DHH
  Vortec 8100   8912V $71.83 (16) 8mm-1.25x25mm bolts 6pt DHH
  6.2 Liter Diesel   8912M $64.80 (16) 10mm-1.50x22mm bolts 6pt
           
Buick, Olds and Pontiac '79 & Earlier        
      8916S $58.31 (12) 3/8-16x3/4" bolts 6pt DHH
      8916A $64.80 (12) 3/8-16x1" bolts 6pt DHH
      8936 $64.80 (12) 3/8-16x1" bolts 12pt
      8956 $106.32 (12) 3/8-16x1" bolts 6pt Stainless Steel DHH
           
2 Bolt Header Kits        
      8910A $10.90 (2) 3/8-16x1" bolts 6pt DHH
      8910B $10.90 (2) 3/8-16x1 1/4" bolts 12pt
           
ADDITIONAL LOCKING KITS:        
SMALL BLOCK CHEVY        
Header Collector (6) 3/8-16x1" bolts 6pt   8950 $26.99  
Intake Manifold   8926 $48.67  
Harmonic Balancer   8993 $36.18  
Starter Motor   8996 $12.85  
Oil Pan   8940 $41.68  
Valve Cover   8960 $20.06  
Valve Cover w/ 1" bolts   8960S $23.06  
Valve Cover w/ 1/4-20 nuts   8961 $20.06  
Timing Cover   8921 $31.36  
Water Pump (Short)   8971 $14.40  
Distributor Hold-Down   8903 $ 7.17  
Pressure Plate   8959 $26.88  
Flex Plate   8965A $59.51  
Flywheel   8965 $35.66  
Automatic Transmission Pan        
  13 Bolt Pan w/ 5/16-18x1/2   8701 $33.02  
  17 Bolt Pan w/ 5/16-18x1/2   8702 $38.93  
           
BIG BLOCK CHEVY        
Header Collector (6) 3/8-16x1" bolts 6pt   8950 $26.99  
Intake Manifold   8927 $54.47  
Harmonic Balancer   8994 $36.18  
Starter Motor 8996 $12.85  
Oil Pan   8941 $50.63  
Valve Cover   8960B $40.08  
Timing Cover   8921 $31.36  
Water Pump (Short)   8972 $14.40  
Distributor Hold-Down   8904 $ 7.17  
Pressure Plate   8959 $26.88  
Flex Plate   8965A $59.51  
Flywheel   8965 $35.66  
Automatic Transmission Pan        
  13 Bolt Pan w/ 5/16-18x1/2   8701 $33.02  
  17 Bolt Pan w/ 5/16-18x1/2   8702 $38.93  
         
INLINE 6 & 6 CYLINDER        
Flywheel Inline 6   8967S $40.08  
Flex Plate (exc. 2.8 Liter)   8966A $41.68  
Flywheel (exc. 2.8 Liter)   8966 $27.34