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LS3  6.2 Tech Specs 430 Horsepower

  Part Number:

  

19201992
   

Balanced:

  

Internal
   

Block Part Number:

 

12584727
   

Block Type:

  

Cast aluminum with 6-bolt main caps
   

Bore x stroke (in):

 

4.06 x 3.62 (103.25 x 92mm)
   

Camshaft duration (@.050 in):

  

204 degree intake / 211 degree exhaust
   

Camshaft Part Number:

  

12603844
   

Camshaft Type:

 

Hydraulic roller
   

Compression ratio:

  

10.7:1
   

Connecting rods (P/N 12617570):

  

Powdered metal
   

Connecting rods (P/N 12617570):

  

Powdered metal
   

Crankshaft (P/N 12597569):

  

Nodular iron
   

Crankshaft (P/N 12597569):

 

Nodular iron
   

Cylinder heads (P/N 12598594):

  

LS3 rectangle port; as cast with 68cc chambers
   

Cylinder heads (P/N 12598594):

 

LS3 rectangle port; as cast with 68cc chambers
   

Displacement (cu in):

  

376 cu in (6.2L)
   

Engine type:

  

LS Series Gen IV small-block V-8
   

Maximum recommended rpm:

 

6600
   

Pistons Part Number:

  

19165089
   

Pistons Type:

 

Hypereutectic aluminum
   

Recommended fuel:

 

92 octane
   

Reluctor wheel:

 

58X
   

Rocker arm ratio:

 

1.7:1
   

Rocker arms exhaust Part Number:

  

10214664
   

Rocker arms exhaust Type:

 

Investment cast, roller trunnion
   

Rocker arms intake Part Number:

  

12569167
   

Rocker arms intake Type:

 

Investment cast, roller trunnion
   

Valve Lift (in):

  

.551 intake / .522 exhaust
   

Valve size (in):

 

2.16 intake / 1.59 exhaust