S&S CYCLE Cylinder Heads
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Gain improved performance now with High Port Flow Cylinder Heads, plus the potential for even greater performance with future upgrades. Fully assembled with springs and valves, these heads come in various compression ratios depending on your chosen heads, pistons, and engine size. For optimal performance, check our Compression Ratios chart for specifications and choose either the 79cc heads for stock motors from 88" to 103", or the 89cc heads for motors over 103" or with high-compression pop-up pistons. The 79cc heads feature 1.940" intake and 1.575" exhaust valves, while the 89cc heads have 2.000" intake and 1.605" exhaust valves, both with .640" springs. Compression releases are machined into the heads (sold separately) except where noted, requiring S&S rocker boxes when using S&S compression releases. Please note, rocker arm components, intake manifolds, and gaskets are not included. Accept OEM intake manifolds, Made in the U.S.A., Must use S&S rocker boxes (PART #90-4110) if S&S compression releases are used., Not compatible with Twin Cooled heads.
Welcome to Lifestyle Cycles, your aftermarket Harley Davidson Superstore! Whether you are looking for a helmet, gloves, handlebars or seat, Lifestyle Cycles has everything you need! Lifestyle offers more than just motorcycles, parts and accessories - we offer a complete immersive motorcycle culture combined with a customer experience equaled by none. Lifestyle Cycles also has an extensive selection of riding gear with our own Lifestyle Cycles branded products as well as all of your favorite brands. You will also find an extensive selection of parts and accessories from names you trust such as Saddlemen, Thrashin, Soundstream, LA Choppers, Legend Suspension and more. Lifestyle Cycles has everything you need to personalize your bike so you don't have just another "me too" Harley-Davidson. Our skilled experts who ride, test and "APPROVE" all of our products are here to guide you through the process to make your dream a reality. We have something for everyone including our California based Lifestyle Cycles Riding Group, with more than 4,200 members. See for yourself why Lifestyle Cycles is the number one online destination. We guarantee you will be impressed!
Return Policy:
At Lifestyle Cycles we want your experience with us to be that of pleasure and our service to be equalled by none. Buying parts and accessories for your bike should be quick, simple and easy! We are also riders and builders! We know that you may not be ready to install the parts and accessories right when you get them. With that in mind, we have a 60-day return policy, which means you have 60 days after receiving your item to request a return.
Read our full return policy here.
Shipping Info:
At Lifestyle Cycles we want your experience with us to be that of pleasure and our service to be equalled by non. Buying parts & accessories for your bike should be quick, simple & easy! We are also riders and builders. We know that you want your parts & accessories as quickly as possible.
Read our full shipping policy here.