Katech's LS3-Based 416 Short Block - Engine Builder Magazine

Katech’s LS3-Based 416 Short Block

Katech has introduced a new LS3-based 416-cubic-inch short block designed to make big power for less. Depending on the camshaft, cylinder heads and other engine components, the new Katech 416 is the foundation for 600 horsepower or more in normally aspirated combinations and up to 900 horsepower or more in boosted applications.

Katech has introduced a new LS3-based 416-cubic-inch short block designed to make big power for less. Depending on the camshaft, cylinder heads and other engine components, the new Katech 416 is the foundation for 600 horsepower or more in normally aspirated combinations and up to 900 horsepower or more in boosted applications.


“The new Katech 416 short block is a big-power foundation that won’t break the bank,” said Jason Harding, director of aftermarket operations at Katech. “Shop around, and you’ll find our 416 LS3 short block is priced at or below competitors’ products while using top-shelf components and, of course, the meticulous precision blueprinting and assembly that 40 years of engine building experience brings.”

Starting with the proven LS3 aluminum block, which is honed by Katech to 4.070 inches and clearanced for a stroker crankshaft, a high-performance Callies forged steel crank with a 4.00-inch-stroke crankshaft is installed in place of the factory-spec 3.62-inch crankshaft. That expands displacement 40 cubic inches to 416 – a nearly 11-percent increase over the stock 376 cubic inches.

The rest of the short-block assembly is filled with high-performance forged components, including Mahle pistons, rings and wrist pins, and 6.125-inch Callies H-beam connecting rods. With heads featuring the stock LS3 combustion chamber volume, the compression ratio is 10.9:1. The short block is assembled with Clevite bearings and all oil/coolant plugs installed.

The Katech 416 short block lists for $5,899.99. A camshaft and other engine components required to build a complete engine are available from Katech, as well as engine building, tuning and testing.

“Whether you want the short block as a starting point to build your own high-performance stroker LS3 or have Katech build an entire engine around it, it’s a great, economical foundation to build big horsepower,” said Harding. “And when it comes to having your engine built at Katech, it will be assembled by the same experienced builders responsible for assembling Le Mans-winning racing engines.”

You May Also Like

Summit Racing Launches ‘My Garage’

In an effort to give car enthusiasts an additional space to show off their vehicles and talk about their projects, Summit Racing has created My Garage on SummitRacing.com. My Garage is a place where you can connect with a community of like-minded folks. You create a ‘garage’ where you can post photos, videos, and updates on your vehicles

In an effort to give car enthusiasts an additional space to show off their vehicles and talk about their projects, Summit Racing has created My Garage on SummitRacing.com. My Garage is a place where you can connect with a community of like-minded folks. You create a ‘garage’ where you can post photos, videos, and updates on your vehicles and projects, then share them with other My Garage enthusiasts. 

TOPDON USA Donates $25,000 for Auto Techs

TOPDON USA, a provider of cutting-edge technology and advanced tools for auto repair professionals and enthusiasts, has announced the donation of $10,000 cash and $15,000 in products to TechForce Foundation, a nonprofit organization dedicated to supporting the education, training and career development of aspiring auto technicians. To date, TOPDON has donated over $66,000 to aid organizations

Amsoil Becomes Official Lubricant of Lingenfelter Performance Engineering

AMSOIL INC. has formed a strategic partnership with Lingenfelter Performance Engineering (LPE) to make AMSOIL products the official lubricants of LPE performance-engineered products. LPE is renowned for its cutting-edge engine builds and engine and chassis tuning components. They also provide component product-development services, durability testing and life-cycle improvements for manufacturers. Founded in 1973, LPE has

Liqui Moly USA Promotes Two to VP of Sales

The two VPs will help assist in shaping the future of the sales department and driving the success of Liqui Moly.

Formula Drift and Partners to Launch Student Program

The 2024 Driven Experience will be free for students and schools, and will include all eight rounds of the 2024 Formula Drift season. 

Other Posts

Motul Partners with Vance & Hines in Numerous Racing Series

Motul’s oils and lubricants will be used by Vance & Hines in King of the Baggers, Twins Cup, and NHRA.

NTK Technologies Announces Merger into Niterra North America, Inc.

NTK Technologies, Inc. has announced it will merge with Niterra North America, Inc. (formerly NGK Spark Plugs (U.S.A.) Inc.). The merger aligns with the organization’s strategy to unify its global brand and aims to enhance its competitiveness and agility in responding to changing business environments. The merger will take effect on April 1, 2024, and

Thousands Oppose California’s Mandate Banning New Gas-Powered Vehicle Sales

SEMA members and industry consumers send EPA over 5,000 letters in opposition to ACC II Waiver

Howell EFI Launches New Website and Promotions

Howell EFI, a leading manufacturer of electronic fuel injection for older pre-computer vehicles of all types, has newly launched a user-friendly website, as well as introduced free ground shipping on orders over $500 to the lower 48 states, and a March Madness sale of 10% off any order. Related Articles – Cummins Announces Next Gen