Our Street-Strip Series 5.3 long block is rated to handle 1000 HP reliably.  Whether you want to pump some boost in this unit and see what that tranny can hold, or if you want to see just how much nitrous a 5.3 can eat, this is the right place to start!

Build Specs:

• GM Iron 5.3 Block
• GM Stock 5.3 Crank
• Forged H-Beam Rods with ARP bolts
• 2618 Forged Pistons - Your choice of Flat Top or Dish
  
• Total Seal AP Steel, Gas Ported, Ring Set
• LS7 Lifters and Trays
• Single roller Billet Gear, performance timing chain and gear set
• Cloyes timing chain dampener, also added to all gen3 builds
• Pushrods, one-piece - hardened, 7.400”
• GM Rockers built with bronze bushing and trunnion kits
• New 12pt Rocker Arm Bolts
• BoostLine CNC Ported 706/862 casting Heads, New Stainless Valves, PAC spring kit with Ti retainers
• Clevite Main and Rod Bearings
• Durabond Cam Bearings
• New block plug kit and barbell
• Melling Oil Pump
• ARP Main Studs
• ARP Head Studs
• Fel Pro Gaskets Throughout
• BTR Small Bore LS9 Head Gaskets - 3.950" Bore
• GM stock valve covers (Upgrade to different valve covers)
• GM stock truck oil pan and pickup tube  (Upgrade Pan)
• GM stock front cover
• GM stock rear seal housing