Karl Kustoms 427 CID LS7 Forged Rotating Assembly 777 HP/660 LB-FT


427 CID LS7

103MM Katech Throttle Body

Frankenstein F710 Heads

prR Carbon Intake Manifold

Out of stock

SKU: KUSTOMLS7 Categories: ,

Karl Kustoms 427 CID LS7

This engine was assembled by our late model performance experts using trusted, durable components.  The foundation is a forged rotating assembly yielding 12:1 compression and custom ground camshaft. This solid short block is topped with a set of Frankenstein F710 Cylinder heads loaded with PAC springs, T & D Shaft mount rockers, and a ptR Carbon Fiber intake manifold.  The end product is a powerful, reliable, and great looking engine that is ready for your late model vehicle, or to add a modern power plant to your hot rod or muscle car.  This engine was broken in and tested on our in-house engine Dyno, and it produced a power peak of 777 Horsepower and 660 LB-FT of Torque.


Build Specifications:

· 427 CID – 4.130 Bore X 4.000 Stroke

· 12:1 Compression Ratio

· JE Forged Aluminum Pistons

· Total Seal Piston Rings

· Callies 4340 Forged Dragonslayer Crankshaft – 58x Reluctor

· Manley Pro-Series Lightweight I-Beam Connecting Rods

· Clevite Heavy Duty HN Rod Bearings

· Federal Mogul Heady Duty Main Bearings

· Frankenstein F710 Cylinder Heads

· Frankenstein F-Series Water Crossover Kit

· T & D COPO Shaft Mount Rocker System

· Custom Spec 8620 Camshaft

· PAC Racing 1209X RPM Series Valve Springs

· Johnson Tie Bar Short Travel Slow Leak Down Lifter Set

· Cloyes True Roller Timing Set

· Katech High Volume Wet Sump Oil Pump

· Trend 3/8s .135 Wall Push Rods

· ptR Carbon Fiber Intake Manifold

· Katech 103mm Throttle Body

· Injector Dynamics 1050cc Injectors

· ATI 10% Underdriven Balancer


Prop65WARNING: These auto parts can expose you to chemicals including phthalates and lead. Installing or using these parts can expose you to other parts containing these chemicals and to engine exhaust, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

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