The Boostline Performance BL383JSB Street-Strip Series 383 LS short block is not to be confused with the old, ever popular 383's of the past. This modernized 383 will blow the minds of some old timers that like to reminisce about the old days and their mouse motor strokers. The Boostline 383 starts life as a standard 5.3 truck motor and gets transformed into a very robust package. Whether you want the fastest Silverado in your neck of the woods or looking to power that muscle car undertaking an LS swap, this is a package worth considering.

Plan to clear 600HP NA with the right cam, cylinder head and intake selection! This package is still dependable at the 1000HP mark if you want to put a little extra squeeze on it with your choice of power adder.

Boostline Performance BL383JSB Specs:

• GM Iron 5.3 Block
• Blocks are CNC Decked, CNC Bored and CNC Torque Plate Honed and Align Honed
• Boostline Center Counterweighted Forged 4 in. Stroke Crank
• ARP Main Studs
• Forged H-Beam Rods with ARP bolts
• Forged 2618 Flat Top Pistons
• ACL Main and Rod Bearings
• Durabond Cam Bearings
• New block plug kit and barbell

Boostline Performance BL383JSB Features:

• Professionally assembled engine built by Boostline Performance
• Precision-machined block and performance rotating assembly
• Designed for street and street-strip performance applications

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART