123 Crisp Dr, Americus, GA. 31719


107 Thrasher Upgrade

113 Thrasher Upgrade

Twin Cam 98" Thrasher Upgrade

Milwaukee 8 Thrasher Upgrade


107 Thrasher Mail Order Kit

113 Thrasher Mail Order Kit

Twin Cam 98" Thrasher Mail Order Kit

Milwaukee 8 Thrasher Mail Order Kit


T124 07-up Engine

T124 99-06 Engine

T111 07-16 Engine

T111 99-06 Engine

T143 99-17 Engine

T143 99-17 Dyna Engine

S&S Engines





Twin Cam 98" Thrasher Upgrade Kit



For 1999-2006 Harley-Davidson Models

One Stop Shop

The machine work is performed on YOUR heads & cylinders.

Twin Cam 98"

Harley Thrasher Kit


A stock twin cam Harley has around 64 horsepower and about 75 foot pounds of torque. 

 The Star Racing Thrasher Kit increases the horsepower on average to 118+ and the torque to 100 foot pounds. 

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

Since 1980, Star Racing has been dedicated to providing its customers with the best in motorcycle performance and reliability

and is pleased to announce the availability of the Thrasher Kit for your 1999 to 2006 twin cam Harley®. 

This kit is a Star exclusive that increases the performance of your motorcycle while maintaining the stock appearance and reliability.

The Star Power Thrasher Kit has been designed to work with the stock clutches, starters, and all other Harley Davidson parts

while maintaining ease of drivability and running on today’s pump gas.

Before and after dyno runs are performed on each bike so you may monitor the progress in performance. 

This means you not only feel the power, you can see it too!

Included in the package:
  • Heads - Pro Ported & Machined
  • Oversized Valves - Intake & Exhaust
  • Custom Cams
  • CP forged Pistons
  • Cylinders Bored & Honed with torque plates
  • Cam Bearings
  • 58mm Throttle Body
  • S&S Adjustable Push Rods
  • All Necessary Hardware & Fluids
  • Complete Labor
  • Before & After Dyno



Turn-Key Package Price:  $5,495


Options to add to your package:

  • TTS tuner $440


  • Boarzilla 2:1 Exhaust System 1995-2008

    Chrome $ 1,099     Black $ 1,249

    Ghost Pipe:

    Chrome $ 389     Black $ 459


  • Bigger, better air cleaner $350-399

Shipping & Transport not included



Went from 66 to 117!!!

That's 51 hp Gain

2000 Fat Boy

98 Thrasher Kit

D&D Fat Cat 2:1 Pipe

S&S Super G Carb


98" Thrasher Kit Dyno Sheet

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.  






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