![]() You get more horsepower because the air doesn’t just come in with greater volume, but also improved velocity. The kit uses the pistons and cylinders installed during your Stage 3 upgrade, then adds a larger throttle body with a cast aluminum manifold to boost air delivery to the engine. Take your bike all the way and give it the highest possible horsepower with a Stage 4 Performance Upgrade. Harley-Davidson Stage 4 Performance Upgrade On November 15-20, receive $300 back on the installation of any Stage 3 performance upgrade. It’s a bolt-on installation where the engine remains in the motorcycle while the upgrade is being performed and components integrated. The Stage 3 kit improves torque by up to 24% over original equipment and gives you up to 39% more horsepower. Clutch components, gaskets and other components help make sure your installation is seamless. ![]() The Stage 3 kit includes larger diameter cylinders, high compression forged aluminum pistons and a performance cam upgrade that gives you an even higher lift than what you get from the Stage 2 upgrade kit. ![]() November 8-13, get $200 back on installation of any stage 2 performance upgrade.Īddicted to power? This month you can also get a Screamin’ Eagle Stage 3 Upgrade with our service special. The Stage 2 upgrade delivers up to 30% more horsepower and 10% more torque. The kits for improved lift, duration and timing focus on either torque or power upgrades. ![]() In any engine, the cam drives the valves and the valves open to allow air in for combustion. But there are also those who are so delighted, they just have to know what happens if they continue to invest.Ī Stage 2 performance upgrade is a cam change upgrade. They’re happy with the enhanced performance and sound. Harley-Davidson® Stage 2 Performance UpgradeĪ lot of people get a Stage 1 performance upgrade, and they’re good to go. The first week of November, get $100 off installation of any stage-1 performance upgrade. Stage 1 is a foundational upgrade, and components are compatible with all other upgrades. A Stage 1 upgrade increases performance by 10 percent and gives your Harley a deeper, throatier sound. The kit includes an air filter that allows your bike to take in more air, a less restrictive exhaust and a tuner that increases the fuel that gets delivered. So from the factory, every Harley® is a fierce sounding, powerful machine, but it could be made even better.Ī Stage 1 Upgrade allows bikes to move more air and more fuel. Manufacturers have regulations that force them to use restricted air boxes and exhaust and to keep the amount of fuel entering the combustion chamber at set levels. ![]() The focus of the Stage 1 Upgrade for Harley® is to get more oxygen through the system and therefore deliver more power to the back wheel. With any combustion engine, more oxygen means more power when that oxygen is delivered efficiently. You get torque and horsepower improvements across the entire RPM range, without compromising your original or dealership warranty coverage. One important thing to know is that when you schedule your performance upgrade through us, your original motorcycle warranty still applies. We’ll break down performance upgrades Stages 1-4, and we’re happy to talk more when you get in touch online, through chat or by phone. If you’re planning your month, you might be wondering what you can expect at each stage. Our Thanks for Performance Service Special changes every week of November to offer you money back on performance upgrade installation. Our promos are always pretty good here at Dallas Harley-Davidson in Garland TX, but this month might be one of the most exceptional of the year. ![]()
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