5:1 compression

unterminated wires on the other

a high-strength alloy offering superior fatigue resistance and durability

Ferrea’s lifter shims restore proper clearance

heavy-duty torsional axle bars made from high-grade aircraft-quality material

BMW M20 3.4L Bully Engine Build by 5150 AutoSport 330CI 5:1 compressionEvery 5150 Bully Engine undergoes a comprehensive disassembly and meticulous inspection by our team of expert technicians. From there, our skilled craftsmen rebuild the engine with precision and care, utilizing top of the line components. No detail is spared; every gasket, seal, and component between the oil pan and valve cover is cleaned, replaced, or upgraded to ensure upmost performance and reliability. The result is a powerhouse engineered for the