So our 540" Extreme isn’t a big enough big-block for you? Let us introduce the 572" Extreme...Over 700 rampaging horsepower and 700 traction-annihilating lb/ft of torque, all on pump gas! Have we got your attention? Mixing all of the right severe-duty parts into a potent, streetable combination, along with precise machining and balancing, all hand-assembled with the skill of more than 30 years of craftsmanship, you have an engine that makes more normally-aspirated power with a single 4v carb than any pair of tires can hold. And to prove this power, each and every engine we produce is broken-in, tuned and tested on our in-house dyno, so you have a guarantee of power and durability.

Block: Dart Big M, 4.630" Bore, 9.8" Deck Height
Crankshaft: Smeding 4340 Forged Steel, Internal Balance, 4.250" Stroke
Rods: Smeding 4340 Forged Steel H-Beam with 7/16" Bolts, 6.385" Length
Pistons: JE Forged Aluminum, Dome, 10.25:1 Compression
Rings: Plasma-Moly Top, Low Friction Oil, 0.043" x 1/16" x 3/16"
Camshaft: Smeding Hydraulic Roller, .614”/.614” Lift, 253°/263° Duration @ .050”
Rocker Arms: Scorpion 1.7 Ratio, 7/16" Stud, Full-Roller
Intake: Edelbrock Victor Jr. Single Plane
Cylinder Heads: Smeding 360cc Intake Port, 2.30"/1.88" Valves, 120cc Chambers
Warranty: 3 Year, Unlimited Miles

Torque Converter: 2,600-2,800rpm Stall Recommended

All of our engine packages are extremely flexible and can be customized! If there is an option you would like and do not see, please call us at 210-446-0960.

https://youtu.be/5mkZP3v41I8