The A.P.E. Stump Puller is the Harley M8 big bore package for riders who want one thing above all else: torque. Designed for strong low-end and mid-range pulling power, the Stump Puller is one of the most popular Alpha Performance Engines upgrades for Harley-Davidson Milwaukee-Eight riders.

Motorcycle gear shift knob shaped like a black 8-ball on a metallic engine background.

What Is the A.P.E. Stump Puller?

The Stump Puller is A.P.E.’s best-value big bore package for riders who want serious performance while retaining stock cylinder heads. Depending on your engine, it can support upgrade paths including 107ci to 124ci, 114ci / 117ci to 128ci, and 131ci options where applicable.

The package is designed around A.P.E. heavy-duty bolt-on cylinders, forged pistons, gaskets, camshaft choice, heavy-duty lifters, intake manifold, injectors, S&S head bolts, clutch springs and cam service components.
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Why Riders Choose Stump Puller

  • Stronger roll-on acceleration..
  • Better overtaking power.
  • Huge low-RPM torque.
  • Improved touring performance.
  • Stronger two-up riding.
  • More confidence on hills and highways.
  • ‍Excellent value compared with more aggressive ported-head packages.
Motorcycle gear shift knob shaped like a black 8-ball on a metallic engine background.

Choosing the Right Cam

Selecting the right camshaft isn't just about picking the most aggressive profile on paper—it’s about matching the cam to your Harley’s engine size, exhaust, intake, and how you actually ride. Whether you are chasing effortless low-end touring torque or aggressive high-RPM acceleration, picking the proper A.P.E. cam profile ensures your Milwaukee-Eight delivers optimal performance, crisp throttle response, and real-world rideability.

CR480 STUMP PULLER

Best for maximum low-end torque, touring and heavy bikes.

CR483 STUMP PULLER

Best for balanced torque and rideability.

CR485 STUMP PULLER

Best for riders wanting the strongest Stump Puller-style performance while retaining excellent street manners.

Help Me Choose A.P.E. Cam
Man working on a blue motorcycle in a dimly lit garage or workshop.

Who Is It Best For?

  • Road Glide riders.
  • Street Glide riders.
  • Road King riders.
  • Ultra and touring riders.
  • Fat Boy, Breakout and Softail riders wanting torque.
  • Riders who carry passengers or luggage.
  • Riders who want huge performance without a full race-style build.
Black custom motorcycle with chrome engine parts and dual exhaust pipes against wooden background.

A.P.E. Power Plus Cam Kit VS A.P.E. Stump Puller: Which Upgrade Suits Your Harley?

Choosing between the A.P.E. Power Plus Cam Kit and the A.P.E. Stump Puller comes down to whether you want a punchy Stage 2 upgrade or a full torque-focused big bore build. The Power Plus Cam Kit is the ideal entry point for riders seeking sharper acceleration, responsive throttle feel, and enhanced mid-range power while keeping their factory engine capacity. On the other hand, the A.P.E. Stump Puller is a dedicated big bore package designed to deliver massive low-RPM pulling power without requiring upgraded cylinder heads, making it the ultimate solution for heavy touring models, two-up riding, and effortless highway overtaking.
Feature A.P.E. Power Plus Cam Kit A.P.E. Stump Puller
Upgrade Type Stage 2 Cam Upgrade (Stock Displacement) Big Bore Kit (124ci / 128ci / 131ci)
Primary Focus Throttle response & mid-range acceleration Low-end & mid-range pulling torque
Cam Options CR480, CR483, CR484, CR485 & newer profiles CR480, CR483, CR485 (Retains stock heads)
Best For First performance upgrade; Stage 2 feel without a full engine build Touring models, heavy bikes, two-up riding, and effortless highway overtaking
Main Benefit Sharper acceleration, stronger Harley feel, and improved rideability Huge low-RPM pulling power and effortless roll-on torque
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why choose taverner motorsports?

A cam upgrade is not just about installing the most aggressive cam available. The right result depends on matching the cam to your exhaust, intake, engine size and how you ride. Taverner Motorsports can help you choose the best A.P.E. cam profile for your Harley and future upgrade plans.
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Testimonials

Gave 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 Brisbane 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

FAQ’s

Some of our most commonly asked questions are answered here. For other queries please contact us directly, so our team can assist you.

What is the A.P.E. Stump Puller?

Is the Stump Puller good for touring bikes?

Can I keep my stock cylinder heads?

What is the difference between CR480 and CR485 Stump Puller?

Do 2017-2019 M8 models need extra parts?

Does the Stump Puller need dyno tuning?

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