S&S CYCLE Super Stock® Cylinder Heads for Twin Cam 106-4270 - 89 cc, Silver

Product type: Top End Components

Vendor: S&S CYCLE

SKU : 0930-0068

Regular price $1,995.95 USD

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Cylinder Heads - Super Stock® - 89 cc - Silver - Twin Cam Upgrade your Twin Cam engine with the S&S CYCLE...

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ENGINE
PARTS

Details

Cylinder Heads - Super Stock® - 89 cc - Silver - Twin Cam

Upgrade your Twin Cam engine with the S&S CYCLE Super Stock® Cylinder Heads (Part Number: 106-4270). Fully assembled with springs and valves, these heads are designed specifically for 1999-2005 engines with a stock crankcase, making them ideal for touring bikes and heavy vehicles. They are especially effective for motors over 103 cubic inches or equipped with high-compression pop-up pistons, providing enhanced performance in larger engines. The combustion chamber offers a slightly higher than stock compression ratio, yet remains manageable for reliable operation. The large 2.000-inch intake and 1.605-inch exhaust valves maintain port velocity, ensuring strong low and midrange response while supplying enough airflow for optimal engine performance.

The S&S high-performance valve springs support camshafts with up to 0.650-inch lift, allowing for greater customization and power tuning. Intake ports flow 264 CFM compared to the stock heads' 182 CFM, significantly improving airflow and overall engine efficiency. Compatibility with stock rocker boxes, exhaust, and intake manifolds makes installation straightforward. The package includes the heads and four long headbolts, with the option to reuse existing OEM long headbolts. Made in the USA, these heads are built for durability and high performance. Note that S&S rocker boxes are required if S&S compression releases are used, ensuring proper fit and function.

Designed for enthusiasts seeking reliable, high-performance cylinder heads, the S&S CYCLE Super Stock® heads deliver increased airflow, improved compression, and compatibility with existing components for a seamless upgrade that maximizes engine output and durability.

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