Stage I Performance Upgrade Info

STAGE I -- AIR CLEANER

There is no greater starting upgrade for your Harley than the "Stage I -- Air Cleaner". It is entirely bolt on. There are 3 steps to the Stage I -- Air Cleaner and although some believe they can be performed separately, we highly recommend doing all three at once.

The first step is a free flowing air cleaner like the Screamin' Eagle K & N style system, this kit is a vast improvement over stock and allows your engine to breath better. It now comes with an improved backing plate that eliminates the old breather hoses and provides a cleaner look.

Next is a free flowing exhaust to help vent all those spent gasses. Depending on budget and the look you are going for, you may want to change the entire exhaust from the heads back, or you may just want to change the muffler part of the system. Again Screamin' Eagle makes performance pipes for every Harley on the road.

Lastly we need to re-jet the carburetor or re-map the Electronic Fuel Injection (EFI) system. With a carb style bike, a Dynojet kit is the best way to provide a stable increase in fuel to go along with the engine's upgraded breathing capabilities. The Dynojet kit itself is upgradeable so when you decide to do additional upgrades all that is needed then is a minor adjustment to the carb. With EFI models, a digital download needs to be performed to re-map the fuel system. This step requires internet access to the factory that is available through Harley-Davidson dealerships.

STAGE I -- BIG BORE

Open It Up! Getting inside the engine and adding big bore cylinders and matching pistons is the fastest way to increase your bike's pulling power. When the torque curve peaks early and continues to pull all the way through the mid-range, you feel it. Big bore engines provide the power required to pass a slow moving camper or to pull a loaded bike up a long grade. Want even more? Step up to the Big Bore Stage II Kit and you add performance-matched cams for measurable increases in torque and horsepower.

STAGE I -- BIG DISPLACEMENT

Get It All! There's no substitute for cubic inches. Screamin' Eagle 110 kits for Twin Cam 96 models and 103 kits for Twin Cam 88 models deliver hard-hitting Street Legal performance with proven reliability. Original Equipment on the Harley-Davidson Screamin' Eagle CVO motorcycles, these Stage I Kits feature system-matched cylinders, heads, pistons, cams and ECM calibrations for demonstrated performance.

Some examples here about Stage I performance upgrade pricing.