Katech LS3 416ci Stroker Engine Build Service | Boosted | 24x or 58x Trigger

Katech LS3 416ci Stroker Engine 

24x or 58x Crankshaft Trigger | Customer-Supplied LS3 Engine

The Katech 416ci LS3 Boosted Engine is built from your customer-supplied GM LS3 base engine and configured for high-horsepower forced induction applications. Designed for serious street and race combinations, this package incorporates premium forged components, CNC-ported cylinder heads, and a validated valvetrain to support boosted performance levels up to approximately 1000 horsepower.

Each engine is assembled using proven components selected for durability, strength, and high-load capability. A Callies Dragonslayer forged crankshaft is available with your choice of 24x or 58x crankshaft trigger configuration to ensure compatibility with your vehicle’s PCM and wiring harness.

Included Components

• GM LS3 customer-supplied base engine

• Callies Dragonslayer forged crankshaft (24x or 58x configuration)

• Callies Ultra forged H-beam connecting rods

• Mahle pistons with DLC-coated pins and rings

• Katech CNC-ported cylinder heads

• Katech competition valve job with hand blending

• Katech camshaft and validated valvetrain package

• Katech C5-R timing chain

• FAST 102mm intake manifold

• LS3 90mm throttle body

• Katech oil pump

• Katech billet belt tensioner

Each engine undergoes dyno break-in and power validation prior to delivery.

NOTE | Shown with optional Katech painted valve covers, oil pan, and intake manifold.

Crankshaft Trigger Compatibility

This engine is available with either:

• 24x crankshaft trigger

• 58x crankshaft trigger

Selection should match your vehicle’s engine control module and wiring harness configuration.

Boost Capability

This 416ci LS3 configuration is rated for boosted applications supporting outputs up to approximately 1000 horsepower when properly matched with fuel system, tuning, and supporting components.