S&S Cycle Cylinder Heads for Twin Cam 90-1293

Description

High port flow gives great performance now, and more later when additional upgrades are done
Heads are fully assembled with springs and valves
Compression ratios vary depending on cylinder heads chosen, pistons used and engine displacement; see Compression Ratios chart for specifications
79cc heads work great with stock motors for 88" to 103" motors; 89cc heads work best for motors over 103" or with high-compression pop-up pistons
79cc have 1.940" intake and 1.575" exhaust valve and springs for up to .640" lift; 89cc have 2.000" intake and 1.605" exhaust and .640" springs
Heads are machined for compression releases (sold separately); S&S rocker boxes required when using S&S compression releases
Do not include rocker arm
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S&S Cycle Cylinder Heads for Twin Cam 90-1293
Item Description
High port flow gives great performance now, and more later when additional upgrades are done
Heads are fully assembled with springs and valves
Compression ratios vary depending on cylinder heads chosen, pistons used and engine displacement; see Compression Ratios chart for specifications
79cc heads work great with stock motors for 88" to 103" motors; 89cc heads work best for motors over 103" or with high-compression pop-up pistons
79cc have 1.940" intake and 1.575" exhaust valve and springs for up to .640" lift; 89cc have 2.000" intake and 1.605" exhaust and .640" springs
Heads are machined for compression releases (sold separately); S&S rocker boxes required when using S&S compression releases
Do not include rocker arm components, intake manifold or gaskets
Heads include four long headbolts, and reuse four long OEM headbolts
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.
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Established in 2002, Lytle Racing Group is an online retailer specializing in off-road parts and accessories. With superior customer service and the finest selection of aftermarket parts, Lytle Racing Group is dedicated to serving it's loyal e-commerce customers!
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LRG stands behind all products we sell. In the event of product failure or defect, products are limited to the manufacturer warranty. Some products will require warranty direct through the manufacturer, in which case we will provide assistance in facilitating the return.
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Returns
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