This $2,649 Stage V kit from H-D is a complete package of matched parts that allow you to build a high-performance 110ci Twin Cam without voiding the factory warranty. The engine even stays in the chassis during the upgrade to save time and money.
The Bolt-In 110 Stage V Tire Shredder kit comes complete with Screamin’ Eagle 4-inch big-bore cylinders, CNC-ported cylinder heads, matching 10.2:1 forged high-compression pistons and rings, Screamin’ Eagle-259 cams, H-D perfect-fit pushrods, high-capacity roller tappets, OE-quality cam cover gaskets, a heavy-duty clutch spring, and a Screamin’ Eagle 58mm Throttle Body with high-flow fuel injectors. We also picked up a 58mm air cleaner and Cam Drive Retention Kit for good measure. We then trucked our 2015 Road Glide over to the H-D fleet center and had our good buddy Alan show us how to properly do this 103-to-110 tire-shredding upgrade conversion. Here’s how it all went down.

Here’s a shot of the 110ci Bolt-In Tire Shredder kit and optional air cleaner.

Photo: Jeff Holt

After all of the stock 103ci parts were taken off the motor we were ready to get down to business.

Photo: Jeff Holt

The new 259 cams were installed on the bike’s cam plate along with the optional Cam Drive Retention kit.

Photo: Jeff Holt

The new cams were installed into the bottom end of the Road Glide’s motor.

Photo: Jeff Holt

The cam chain and tensioner were then adjusted to factory specs.

Photo: Jeff Holt

The cam cover was then bolted back onto the engine.

Photo: Jeff Holt

The H-D high-capacity roller tappets were lubed with engine oil.

Photo: Jeff Holt

The tappets were installed into the engine one by one with care.

Photo: Jeff Holt

Alan then installed the pair of Screamin’ Eagle 10.2:1 forged high-compression pistons on the stock rods.

Photo: Jeff Holt

The 4-inch big-bore cylinders were installed carefully over the pistons.

Photo: Jeff Holt

The kit also includes all caskets needed to do the 103 to 110ci upgrade.

Photo: Jeff Holt

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A set of factory-ported Screamin’ Eagle heads were then installed on top of the jugs.

Photo: Jeff Holt

The heads and cylinders were torqued to factory specs.

Photo: Jeff Holt

The pushrod tubes were reinstalled onto the motor.

Photo: Jeff Holt

New perfect-fit pushrods (included in the kit) were also installed at this time.

Photo: Jeff Holt

The bottom rocker box covers were bolted back on the bike with new gaskets.

Photo: Jeff Holt

The stock H-D rockers were bolted back into place and torqued to factory specifications.

Photo: Jeff Holt

Alan installed the top rocker box covers and bolted them into place.

Photo: Jeff Holt

A Screamin’ Eagle 58mm Throttle Body with high-flow fuel injectors was then bolted to the new 110ci heads and jugs.

Photo: Jeff Holt

The optional Screamin’ Eagle 58mm air cleaner in black was the last thing to go on the motor.

Photo: Jeff Holt

And there you have it: 103ci to 110 bolted on in less than a day!

Photo: Jeff Holt

Dyno Chart

Photo: Jeff Holt

Source
Harley-Davidson
harley-davidson.com

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