Thrasher Kits for Stock Harley-Davidson Motorcycles

Call 800-841-STAR or E-mail for more information.

Our Thrasher series, engine packages are the most powerful and reliable available.


2007-2016 CVO 110 Models

  • Continous research and developement has uncovered 10 more foot pounds of rear real torque.

  • We finished our newest updated design 113" Thrasher Kit on a NEW 2014 110" CVO Harley-Davidson Road Glide.

  • This motorcycle came to us with only 90 horsepower, and we added 50 more!

  • Now it's WAY more fun to ride! We bored it to 113 cubic inches at 10.8 to 1 compression ratio.

  • We installed our custom pistons, custom ground cams with oversize valves, and ported the heads to add 50 more rear wheel horsepower!

  • Not just a "port and polish" job! But, a big change in shape and size to flow enough air to make 140 HP.

  • We finished with just over 140 RWHP and just over 140 ft. lbs. of torque!


Call 800-841-7827 to make an appointment.


Included in the package:

  • Cylinder Heads - Pro Ported & Machined

  • Cylinders - Bored & Honed With Torque Plates

  • Oversized Valves - Intake & Exhaust

  • Performance Valve Spring Kit

  • Titanium Retainers

  • 113 CVO Twin Cam & Piston Kit

  • SE Pro High Flow Injector Kit

  • Custom Ground Cam Kit

  • Camshaft Installation Kit

  • S&S Adjustable Pushrod Kit

  • MLS Head Gaskets

  • FBW 58 mm Throttle Body

  • Manifold Modified to Flow

  • S/E Clutch Upgrade

  • All Necessary Hardware

  • Fluids, Filter, & Plugs

  • FireCore Wires

  • Complete Labor

  • Before & After Dyno Test

  • Custom Dyno Map

Turn Key $5,995

Options to add to your Package:

Boarzilla Exhaust............starting at $1,200

TTS Tuner............$440

Bigger, Better Air Cleaner.............$399

These are options that work best with our Packages.

We have these as options because some folks already have these items. 

We use the TTS tuner or the Screaming Eagle Tuner.

Email for more info and details.

Turn around time is typically 3-4 weeks for our Thrasher kits depending on shop workload, so you will be back on the road in no time!


WARRANTY - Star Power makes no warranty, expressed or implied, as to the products sold, manufactured, or imported by us, including without limitation any warranties or merchantability and fitness for a particular purpose. These parts are designed for racing only; use them at your own risk.

YOUR COMPLETE SATISFACTION IS OUR GOAL – Most performance parts are designed for off highway use only and may not be legal for use on public streets, roads, or highways. Performance parts are inherently short lived and must be inspected regularly to prevent untimely failure and/or damage. Any new or modified parts, or any services provided by Star Power (or which are sold through Star Power) are sold as performance parts and are sold as is with no warranty, unless specified by the individual manufacturer.