BL427JSB Street-Strip Series 427 ci. GM Gen IV LS Short Block Engine

Name: BL427JSB Street-Strip Series 427 ci. GM Gen IV LS Short Block Engine
Brand: BOOSTLINE PERFORMANCE
SKU: 069-BL427JSB
Price: 9399.00 USD
Availability: InStock

^$9,399⁰⁰

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Short Blocks

Street-Strip Series 427 ci. Short Block

Aluminum GM 5.3L Block

4.125 in. Bore

Darton Sleeves

ARP Main Studs

Forged 4 in. Stroke Center Counterweighted Crank

Forged H-Beam Rods w/ARP Bolts

Forged 2618 Flat Top Pistons

The Boostline Performance BL427JSB Street-Strip Series 427 short block has all the ingredients to pack the punch you're after. The aluminum block 427 Darton Sleeved LS combo is a proven performer and is quickly becoming our most popular short block combination. The 427 is a big bore (4.125 in.) with a stroker crank (4.000 in.) making it a torquey beast. The large bore size allows you to use higher flowing cylinder heads, like the LS7 Style cylinder heads. This combo has become the go to for power adder guys, no matter if it's boost or nitrous!

Boostline Performance BL427JSB Specs:

GM Aluminum 5.3 Block with Darton Sleeves
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 & Rod Bearings
Durabond Cam Bearings
New block plug kit and barbell

Boostline Performance BL427JSB 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

427ci. LS Power Built for Serious Performance

Boostline Performance 427ci. GM Gen III/IV LS engines deliver large-displacement capability within the proven LS architecture. Built from properly machined iron blocks and equipped with forged internal components, these engines are engineered to withstand aggressive street and street-strip use. Short Block and Long Block options allow builders to tailor their project while maintaining confidence in the precision assembly and component quality that define the Boostline Performance lineup.

Part TypeEngine

Product LineBoostLine Performance Street-Strip Series 427 ci. GM LS Engines

BrandBOOSTLINE PERFORMANCE

Package Height16.5

Package Width20.2

Package Length24.25

Weight241.0 PG

Part CategoryPerformance Parts

Engine TypeShort Block

Engine Block MaterialAluminum

AssembledYes

Connecting Rod Beam StyleH-Beam