S&S CYCLE Cylinder Heads - Twin Cam
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These Twin Cam Cylinder Heads offer unbeatable performance now and even more in the future with additional upgrades. Fully assembled with springs and valves, these heads come in various compression ratios depending on your chosen cylinder heads, pistons, and engine displacement. With 79cc heads, stock motors from 88" to 103" work great, while 89cc heads are best for motors over 103" or with high-compression pop-up pistons. The 79cc heads have 1.940" intake and 1.575" exhaust valves with up to .640" lift springs, and the 89cc heads have 2.000" intake and 1.605" exhaust with .640" springs. These heads are machined for compression releases (sold separately) and require S&S rocker boxes for use with S&S compression releases. Don't forget to reuse four long OEM headbolts and 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.
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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.