KAT-A7000-58 416ci LS Short Block (NA)



First-ever from Katech!

Contact us for expected delivery

Available on backorder


Up to 700 highly affordable horsepower from a brand new GM block with top-shelf components. From the master engine builders at Katech.

Install it yourself, or have us do it for you. Want to win? This premier street engine includes:
• Production LS3 block – CNC stroker clearanced
• 58x or 24x Callies forged crankshaft – 4-inch stroke
• Callies forged connecting rods
• Mahle forged 4.070 pistons/rings/pins
• 10.9:1 Compression ratio with a stock LS3 chamber
• Clevite bearings
• Block oil/coolant plugs included

Valley cover and rear cover sold separately