Screamin’ Eagle Extreme CNC-ported cylinder heads provide significantly improved efficiency of cylinder filling, leading to more explosive power and increased rear-wheel torque when compared to stock.

In an effort to bring more simplicity to Harley's high-performance engines, this new 135-cubic-inch engine is also compatible with the new wireless Screamin' Eagle Pro Street Performance Tuner ...

Harley’s most powerful V-twin now available as a crate motor We're talking 135 cubic inches of Milwaukee muscle pumping out 130 horsepower and an incredible 143 pound-feet of torque ...