Holden Performance

Harrop Authorised Dealer

KPM Motorsport are now proud to be an Authorized Harrop and PWR Dealer and Component Installer for Adelaide.

At KPM Motorsport, we are a One-Stop Shop for all your Holden performance car component and engine build requirements!

KPM are the Adelaide authorsied Harrop ( Partners In Performance ) workshop.

This means correct parts , correct fitmant, correct price with the authourised backup from Harrop Engineering. 

If you are looking to upgrade your Holden with quality PWR or Harrop performance products, contact us for guaranteed supply, correct fitment and ‘Blow-Your-Mind’ engine enhancements!

Harrop Stealth HH112 LS Commodore/GTO Supercharger Kit

Offering Stealth performance that fits under most standard hood profiles, this is possibly the best bolt-on performance improvement available for LS1/2/6 variants (L76/98 available soon). The package delivers exhilarating yet totally affordable supercharger performance, representing exceptional value and reliability. The increase in usable torque is outstanding, while maintaining (and consistantly improving) fuel economy. Kits now available to suit all models from VTII cable, right through to the current VZ electronic, and including LS2 electronic throttle control. VE electronic available soon.


All Harrop supercharger packages share the following passion:

  • Designed, manufactured and supported by an 100% Australian company using only Harrop and Eaton components,
  • Harrop Engineering is the only Eaton-trained, authorised and certified supercharger company in the Southern Hemisphere,
  • Full ADR/EPA approval pending for our latest range of HH112 kits,
  • Available in shot-peened or polished finish.

Contact KPM for a fitted and tuned price for your application.



"HARROP HURRICANE" LS1 8 Butterfly Inlet Manifold

Our popular Harrop Hurricane inlet manifold to suit the LS1/LS6/LS2 engines with substanitial modifications.

The Hurricane is available for cable-pull or electronic throttle control applications to suit all early cable, VZ "Hitachi" electronic, and the new LS2 electronic coming soon.

Supplied standard with 8 x 52mm diameter throttle plates, or with our optional 55mm diameter for BIG engine combos!

All throttle control versions now available.

LS7/C5R model under development.


Contact KPM for a fitted and tuned price for your application.


KH47 Harrop Sports Differential Cover And Mount

Harrop Holden IRS Sports differential cover and mount assembly has been developed to reduce the axle tramp and also with the added oil volume to keep the diff cooler.


  • Designed to suit Holden IRS Commodore, Monaro, GTO vehicles
  • Direct bolt-on upgrade for the standard diff cover and sub-frame rear mount
  • Significantly reduces axle tramp in most applications
  • Substantially increases oil capacity, resulting in improved cooling and durability
  • Utilises standard wheel speed/ABS sensors

VT-VZ Commodore/GTO/Monaro/IRS Utility: $595.00 (supply only)

VT-VZ Commodore/GTO/Monaro/IRS Utility: $895.00 (supplied and fitted)

Harrop LS1 Nodular Iron Stroker Crankshaft

Following on from the ever popular Harrop Holden 355 ci early stroker crankshaft, Harrop is pleased to announce the introduction of our LS1 4.00" nodular iron stroker crankshaft.


  • Developed for ultimate durability
  • Precision CNC machined and final ground to the most exacting tolerances
  • Nodular iron casting for ultimate strength
  • Utilises standard and aftermarket replacement harmonic balancer and flywheel assemblies
  • Shipping in protective packaging to eliminate transport damage
  • 4.00" stroke to increase capacity from 5.7 (346ci) to 6.3 (383ci) or LS2 from 6.0 (366ci) to 6.6 (402ci)
  • Crankshaft supplied complete with installed timing encoder
  • Original equipment replacement

Cost: AUD$1,650.00 inc. GST (US$1,125.00)

**Complete Kit prices including H beam connecting rods and forged pistons coming soon**

KPM Online Shop
Log Book Servicing

Bring your vehicle to KPM Motorsport for complete manufacturer approved servicing. All makes and models.

Call 8299 9998