This Evolution Style Motor is factory assembled and will fit in place of your stock Evo Motor with no modifications!
Ultima's new El Bruto Series Engines are designed to provide customers with a U.S.A. built high performance engine that is priced to be the best value of any engine on the market. Ultima's commitment to engineering excellence and competitive pricing brought El Bruto to life with a completely new designed set of castings emphasizing performance, reliability, and value.
All of the castings in these engines are poured in U.S. foundries and are based on all new CAD designs cast from C355 aluminium, a common U.S. 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 engines are dynamically balanced using propritory methods to provide the smoothest running engines on the market. With their new high-flow cylinder heads, these are now the most powerful engines on the market as well. The Ultima El Bruto Engines are available with show polished, black or natural finishes. The 100, 107, and 113 cubic inch motors come with a 12 month or 12,000 mile manufacturer's warranty. The 120 and 127 cubic inch motors come with a 6 month or 6,000 mile warranty.
Made in U.S. cast-in steel inserts guaranteed not to move. Large bore breather for increased crank case vacuum and less blow by. Alignment dowels for true line bore. Counterbored stainless allen head case bolts. Close machining tolerances. Made from prime C355-T6 aluminum that is superior in strength to A356. Styling and cosmetic machining for a custom look.
Newly designed crankshaft incorporates a massive 1.670" diameter pin that is pressed into the one piece, heat treated, 4140 steel flywheel half making these crankshafts some of the strongest available on the market today. These crankshafts feature all new H-Beam rods with extra thick wrist pins to handle all the power you can throw at them. These are also balanced using our exclusive methods making these some of the smoothest engines in the industry.
C355-T6 Casting. Cast in liners will not move. All fins are machined for an excellent cosmetic appearance.
C355-T6 Casting. All fins are machined for excellent cosmetic appearance. Twin Cam Styling means 30% more fin than most Evolution Style heads for cooler running. Compression release valves. 2.100 stainless intake valves, 1.700 stainless exhaust valves. Manganese Bronze guides. High silicon wire valve spring with chromoly retainer. Contact us for additional information.