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The Milwaukee-Eight is a strong engine platform, but factory Harleys are designed to meet broad emissions, noise and rideability requirements. A properly selected A.P.E. package unlocks the performance that sits beneath the surface.
Unlike generic bolt-on upgrades, Alpha Performance Engines packages are designed as matched combinations. Camshaft choice, cylinder capacity, compression, fuel delivery, valve train components, intake flow and supporting hardware are selected to work together. That means your Harley does not just make more power; it feels better everywhere you ride.
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The Power Plus Cam Kit is the best entry point for riders wanting a noticeable performance upgrade without moving straight into a big bore package. With cam options including 480, 483, 484, 485 and selected newer profiles, the Power Plus package improves throttle response, mid-range torque and overall rideability. It is best for riders wanting a Stage 2-style performance upgrade, sharper acceleration and a stronger Harley feel.
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The Stump Puller is A.P.E.’s torque-focused big bore package. It is designed for riders who want huge low and mid-range pulling power, making it ideal for Touring models, heavy bikes, two-up riding and riders who want effortless overtaking.
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The Street Performer package is the all-rounder. It is designed for smooth, broad power delivery, strong low-end torque and 150+ horsepower and torque potential when supported by the right parts and tuning.
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Sneaky Pete is a stronger performance package for riders chasing serious street power. It is designed to produce north of 155 horsepower and torque with the right air cleaner, exhaust and tuning combination.
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Silverback is the flagship naturally aspirated A.P.E. package. It is designed for riders chasing 160+ horsepower potential, top-end rush and maximum naturally aspirated performance.
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Horsepower & Torque: The APE Sneaky Pete delivers 150 hp+, while the Silverback pushes 160+ hp. Expect substantial torque gains for stronger launches and effortless overtaking.
Enhanced throttle response and a power delivery that makes every ride more enjoyable, whether in the city or on the open highway.
All kits are engineered for everyday usability, balancing high performance with long-term durability and minimal maintenance.
Benefit from precision tuning for optimum results, ensuring your engine performs at its peak.

Our warehouse stocks over 11,000 parts from many different suppliers for a range of classic motorcycles, particularly for Harley Davidson and British motorbikes. Our parts department is on hand with great expertise to help you find just the right part for your ride.
Read MoreGave me a great deal on some nice grips and installed them for me, great customer service. will definitely be visiting whenever i need service for my harley
James Southam
QLD
I purchased my Talaria Sting electric bike from Brian. The team at Taverner Motorsports where helpful and ensured that my bike was ready for pick up. I would highly recommend!
Banos Porter
QLD
Great guys, honest, knowledgeable and do great work at more than reasonable rates. Thanks for the work on my CX
Damian Joyce
QLD
I visited the place when I was in Briabane and I was very well taken care of! I recommend!
Fabiano Sena
QLD
Could not recommend highly enough. Took on my 18 year old Buell. Expert mechanics with great attention to detail and the comms from Brian was second to none.
Leigh A
QLD
Couldn’t have been happier with the work i recently had done to my 2017 breakout . Expert advice and experts on the tools quick turnaround on Christmas week ! Thanks so much Joe and Cat 👍
feidhlim corr
QLD
I had an absolutely excellent experience, my bike came back in better condition than i dropped it off to them.. extremely happy with the customer service and workmanship.
Danny Meredith
QLD
Great people. Diverse bikes in the shop. You can tell they are not snobs and just real motorcycle people
Carlo A
QLD
I recently had my Harley Davidson Sportster serviced and was thoroughly impressed with the work performed by the them.
I am extremely satisfied and highly recommend their services to anyone seeking top-notch maintenance.
Abhi Singh
QLD
Definitely recommended easy to deal with Clear, responsive and understanding Of what I wanted and was stoked with the outcome Honestly, Joe and cat thanks heaps again
SKYHAWK SANDO
QLD
Awesome people who are extremely knowledgeable and experienced and very fair pricing.
Had my 883 serviced once before somewhere else, however after the Taverner service I realised how it was meant to run!
Magdalena
QLD
Alpha Performance Engines, commonly known as A.P.E., is an Australian Harley-Davidson performance brand specialising in Milwaukee-Eight cam kits, big bore kits and high-output performance packages.
The best package depends on your goals. Power Plus is ideal for a first upgrade, Stump Puller is best for torque, Street Performer is the best all-rounder, Sneaky Pete suits serious street performance, and Silverback is for maximum naturally aspirated horsepower.
Yes. A.P.E. offers package options designed to take a 107ci Milwaukee-Eight to 124ci.
Yes. A.P.E. offers 128ci packages for 114ci and 117ci Milwaukee-Eight engines.
Yes. Dyno tuning is strongly recommended to optimise fuel delivery, ignition timing, throttle response and safe air-fuel ratios.
The Silverback is the highest-output naturally aspirated A.P.E. package, with 160+ horsepower potential when supported by the right parts and tuning.