Ultima is now offering the new " El Bruto" series engines which are designed to provide our customers with a USA built High Performance engine that was priced to be the best value of any engines now on the market. Midwest’s commitment engineering excellence and competitive pricing brought El Bruto to life with a completely new design set of castings emphasizing performance, reliability, and value.

All of the castings in these Engines are poured in US foundries and are based on all new CAD designs cast from C355 Aluminium a common US Military alloy known for its stability over multiple heat cycles.

The engine components are machined on state of the art CNC equiptment for guaranteed dimensional accuracy and repeatability.

All of the EL Bruto engines are dynamically balanced using propritory methods to provide the smoothest running engines on the market and now with our new high flow cylinder heads these engines now can boast the most powerful engines on the market as well!!

EL Bruto 100 cubic inch Competition Series Complete Replacement Engine with Mild Cam and Black Acccents

• Large bore breather for increased crank case vacuum and less blow by.
• 1/2” Alignment dowels for true line bore.
• Counterbored stainless allen head case bolts. 
• Dynamic balanced forged 4140 Steel crankshaft
• Mild cam for lower compression and easier starts
• Light weight 7.44” high-performance H-beam rods w/.792” fins
• All fins are machined for an excellent cosmetic appearance
• C355-T6 cast cylinder head
• 30 % More fin area than Evolution® style heads for cooler running.
• 2.100 Stainless Int. valves
• 1.700 Stainless Ex. valves
• Manganese Bronze guides
• High Silicon Wire Valve Spring with Chromoly Retainer

Specs:

• Bore: 4.000”
• Stroke: 4.25”
• Piston: Forged
• Compression: 10:1
• Rated Power: 115 HP, 120 LB FT Torque
• Camshaft: 248  Duration .625” lift
• Valve Spring: Ultima
• Chrome Nose Cone / Rocker Boxes
• Billet Oil Pump
• Chrome Tappet Blocks
• Ignition included on assembled engine