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.
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.
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.
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.
