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Katech 243/799/317 Ultimate CNC Head Porting, Valves and Assembly  Product 562 of 798 in category LS Engine Components  Katech 862/706 Basic CNC Cylinder Head Porting Service

Katech 416ci LS3 Short Block, Boosted

Katech 416ci LS3 Short Block, Boosted
   
$12,074.99 
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Katech 416ci LS3 Short Block, Boosted

A brand new GM block with top-shelf components. From the master engine builders at Katech. Install it yourself, or have us do it for you. Want to win? This premier street engine includes:

  • Production LS3 block – CNC stroker clearanced
  • 58x Callies 8CW forged crankshaft – 4-inch stroke
  • Callies Compstar XD forged connecting rods
  • CP-Carillo forged 4.070 pistons/rings/pins 
  • 10.0:1 Compression ratio with a stock LS3 chamber
  • Clevite bearings
  • Block oil/coolant plugs included

Valley cover and rear cover sold separately.

 

Crankshaft and connecting rod upgrades available at request.
This product was added to our catalog on Thursday 17 September, 2026.
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Katech 243/799/317 Ultimate CNC Head Porting, Valves and Assembly  Product 562 of 798 in category LS Engine Components  Katech 862/706 Basic CNC Cylinder Head Porting Service
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Paragon OBDII Port Lock Anti Theft Device, C8 Corvette and others
Paragon OBDII Port Lock Anti Theft Device, C8 Corvette and others
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