The Boostline Performance BL413JLTSB Street-Strip Series Iron 413 is built for customers who want serious Gen V LT performance without the cost of an aluminum block and aftermarket crank and rods. Using the incredibly stout L8T iron block as the foundation, this package delivers proven strength, long-term durability, and excellent value for street-strip builds.

Featuring a 4.125 in. bore and a 3.860 in. stroke, this combination is designed for efficiency, reliability, and budget-conscious power. The iron L8T block provides superior stability and is well suited for boosted or high-load applications, making it an ideal choice for customers who want dependable performance without stretching the budget.

Whether you're upgrading a workhorse truck, building a street-strip Silverado, or completing a cost-effective LT swap into a muscle car or hot rod, the Street-Strip Series Iron L8T 413 offers durable construction, flexible fueling options, and real-world performance-without the premium price of an aluminum block package.

Boostline Performance BL413JLTSB Specs:

• GM Gen V L8T Engine Block bored to 4.125 in.
• Blocks are CNC Decked, CNC Bored and CNC Torque Plate Honed and Align Honed
• L8T Center Counterweighted 3.860 in. Stroke Crankshaft
• L8T Rods with ARP bolts
• Forged 2618 Flat Top Pistons
• ACL Main & Rod Bearings
• Durabond Cam Bearings
• New block plug kit and barbell

Boostline Performance BL413JLTSB 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.

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