Here at Limitless we totally understand that need for more power baby! We all know Harleys sometimes lack that grunt from factory, (maybe not for all of us but for the Hooligans amongst us this is the case)! 

So for those who need it we have multiple performance upgrades to suit all riders from a Stage1 tunes all the way through to bespoke power packages and rolling road dyno tuning giving your Harley Davidson the power that it deserves and in most cases needs!


With over 30 years combined experience and multiple engine builds a year we have the knowledge to pull maximum power from your Harley Davidson from 883's needing that 1200cc conversion all the way into those 131ci muscle bikes, we have build packages for everyone, and each one can be tailored to what suits your riding style, low end grunt or those highway cruises. 


Below is some off the shelf options we offer for the more popular bikes in the UK, M8 Softails and Sportsers, 

**Please note we also offer engine builds for ALL HD models and can quote via the phone or email**



No compromising with this kit when it comes to wanting more power from your beloved Sportster the S&S Hooligan kits for 2000-’21 Harley-Davidson ® Sportster ® models will give you an edge on the competition. Boost that 888 to 1200 and 1200 to 1250cc. Bolt on big bore kits mean easy installation with no machining and no rebalancing. S&S bolt-in cams and Precision Tappets make the most of the added displacement.

  • Up to 85 horsepower with S&S intake & exhaust

  • Easy installation – Bolt-on parts – no machining, no rebalancing

  • Increase 1200cc engines to 1250cc

  • Use stock heads, pushrods, and fuel system

  • Includes 482 cams

  • Available in wrinkle black that matches stock finish

Kit only Price = £1169.00 + VAT 

Fitting = £850 + VAT

** You will need an FP3 or tune to go along with this kit**

(Not Included in price)

Good extras to add 

Exhaust System

High flow air filter 

High flow Injectors 

Upgraded Spark leads

Upgraded Spark Plugs

Engine Black out

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107 to 124ci and 114 to 128ci POWER PACKAGES

The S&S Power Package is the ideal kit for boosting the performace of any M8 engine. The kit comes complete with everything you need from Barrles and Pistons in the standard kit to the lengthy list below in the ultimate POWER PACKAGE. With a very notible increase in power these kits really do pack a punch in performace putting a smile on your face everytime you pull back on that throttle. 

  • Wrinkle Black Finish

  • Available With or Without Fin Highlighting

  • Bolt-On Kit — No Case Machining Required

  • 4.250" Bore

  • Forged Pistons

  • 11.1 Compression Ratio

Oil Pump/Cam Plate:

  • Precision Machined from Billet Aluminum

  • Passage Plugs Removable for Servicing

  • Independent Scavenge Sections for Flywheel Cavity & Cam Chest

  • Debris Screens in Both Scavenge Pickups

  • Magnet in Cam Chest to Help to Stop Debris from Entering Oil Pump

  • Increased Flow Capacity on Both Feed & Scavenge Side

  • Pressure Relief Valve is Adjustable with Unit Installed in Engine


  • Quickee Pushrods

  • Chrome or Gloss Black Pushrod Tubes Available


  • S&S Precision Tappets

Tappet Cuffs:

  • Hard Anodized Black Coating

  • Billet Aluminum Construction

  • Stronger than Stock Material Eliminates Distortion

  • Improve Tappet Stability in High Lift & High rpm Situations


  • S&S 550 Cam- Designed for Big Bore Applications

  • Available in Both Gear Drive & Chain Drive Variations

  • Gear Drive Kits Provide Improved Cam Timing Accuracy & Eliminate Stock Chain Tensioner

  • Gear Drive Kits Include Outer Drive Gears

Valve Springs:

  • High Performance Conical Single Wire Spring



  • Includes Top Collars, Keepers, & Valve Seals/Bottom Collars


64mm Throttle body 

wide range of injectors 

Air Filters 

Exhaust Systems 

Larger Cams

Engine Black out 

**Ask for pricing**

124-128CI Prices


(fitting - £650+Vat)

POWER PACKAGE Kit only- £2041 +Vat 

(Fitting - £1200 + Vat)


Tuning by Dyno Jet- £350 + Vat

FP3 Tuner pack £325 + Vat

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