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PERFORMANCE ENGINE BUILDER
SERVICES

SERVICES

PERFORMANCE ENGINE BUILDING

CYLINDER HEAD

PORTING AND

FLOW TESTING

ENGINE ASSEMBLING

AND BLUEPRINTING

Ultimate performance, horsepower and durability. Balancing and fine tuning.

The art of creating great cylinder heads with a grinder and a flow bench.

Boutique high-performance engine building, pushing it to its limits.

Specialising in the GM LS series of engines. LS1, LS2, LS3, LS6, LS7, LSX,  LS Racing engines

LS ENGINES

SPECIALIST

All Harrop Engineering's performance parts will be fitted with immaculate precision to your engine with full Harrop warranty.

HARROP ENGINEERING ACCREDITED PERFORMANCE SPECIALIST

MY WORK

A collection of engines I've built with passion. Find out more under Projects

Group A twin throttle body manifold
Dragon slayer billet crank shaft
LS Engine cylinder head porting
Engine detailing
700 HP LS Engine - Hazard
LS Engine head and cam
RB30 Porting and flow testing
LS Engine Dry sump system
Engine assembly and blue-printing
Our work

LATEST PROJECTS

Featured in the photo: GTSR W1: The last and most powerful Commodore ever produced can still benefit from discrete upgrades.

ABOUT US

ABOUT ME

Unless it involved an engine or a car since 1988, Shane's attention for extracting performance as well as reliability from any type of engine has never altered. Leaving school to work at his father’s mechanical / smash repair garage it wasn't long before fast cars had become his life.  At 17 he assembled his first Holden V8 that ran 11 second quarters at over 120 MPH and by 19 had built the first carbureted Holden with VN heads using a prototype intake manifold in Qld that would regularly turn past 9000RPM. 
In 1994 Shane started working for the late Mick Atholwood. A well-respected place specialising in racing engines of all classes that also held multiple national records from sprint car engines right through to top fuel. By this stage cylinder head porting and flow testing played a major role in Shane's engine development and it started to show, a national record in 6 cylinder hydrofoil class (105MPH) average and breaking a long-standing world record held by Jack Roush with a Ford, this flowed over V8 supercars, and in 2001 a set of his modified cylinder heads were on the front row at Bathurst. 
Shane started full-time employment at Powertorque Engines, where blue printing and assembling any form of an engine could be one day, followed by a head and cam package the next. A merge with Walkinshaw performance opened yet another chapter that involved modifying brand new HSV's, supercharging, cams, suspension or a full exhaust.In 2007 whilst Shane still worked for Powertorque, Mick Atholwood recorded a 4.91@283 MPH in their top fuel dragster using Shane Alex cylinder heads ported from raw billets 10 years previous. 
In 2014 Shane Alex Engines was reborn and hit the ground running.

CONTACT

FIND MY WORKSHOP

113 Rainbow Street

Sandgate

Queensland 4017

07 3869 4853

OPENING HOURS:

Mon - Fri: 7:30am - 5pm

​​Saturday: Closed

​Sunday:    Closed

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