1926-1984 Vintage Models - S&S Cycle
1926-1984 Vintage Models - S&S Cycle
1926-1984 Vintage Models - S&S Cycle
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<strong>1926</strong>-<strong>1984</strong> <strong>Vintage</strong> <strong>Models</strong><br />
Flathead Power ® by S&S ®<br />
Cylinder Heads<br />
For 1940-’47 OHV Big Twin Engines<br />
Flathead Power® KN-Series cylinder heads can be used as replacement heads for al KN-Series engines<br />
and can be used on stock and modified 1936-’47, 61" and 74" OHV engines. Like stock, all KN Series<br />
heads have the fire ring machining for 61" models that was maintained in stock 74" models thru 1947.<br />
Heads are cast from high quality engineering- grade grey iron, and have a stock-look black powdercoat<br />
finish. The larger 1.940" diameter intake valve and a stock 1.750" diameter exhaust valve, allows them to<br />
handle the larger displacement of the KN93 engines, but works as a high performance upgrade for 61"<br />
and 74" engines as well. These heads are drilled with the stock bolt pattern. However, head bolt holes are<br />
7/16" -20 thread and will not work with stock 7/16" - 16 thread head bolts. (Stock 1948-'65 head bolts can<br />
be used in stock bore applications and are available on page 5-52, big bore applications must use the S&S<br />
12 point head bolt also found on page 5-52)<br />
Fitment<br />
<br />
<br />
<br />
• KN-Series engines<br />
• 1940-'47 OHV big twins<br />
• 1936-'39 with a manifold upgrade<br />
Features and benefits<br />
<br />
• Durable stock-look black powdercoat finish<br />
• Counter bore for 61" cylinder fire ring<br />
• Set up for o-ring manifold or late style port plumber fittings<br />
• 1.940" intake and 1.750" exhaust valve<br />
• Valve springs allow cams with up to .480" lift<br />
• Compatible with stock or S&S valve cover "tins"<br />
Options<br />
• Fully assembled or unassembled<br />
• Fully assembled with valves, rocker arms, tins and housings complete<br />
• Guides installed for use with FHP tins (valves ground)<br />
• Guides not installed for use with stock tins (valves not ground)<br />
• 14mm or 18mm spark plug hole<br />
• Made of engineering-grade grey iron – better heat dissipation, less sound transfer<br />
PERFORMANCE<br />
PARTS<br />
Parts for<br />
Twin Cam 96 /103 <br />
2007-2013<br />
Parts for<br />
Twin Cam 88 ®<br />
1999-2006<br />
Parts for<br />
Evolution ®<br />
<strong>1984</strong>-1999<br />
Parts for<br />
Sportster ® & Buell ®<br />
1986-2013<br />
Parts for<br />
<strong>Vintage</strong> Engines<br />
<strong>1926</strong>-<strong>1984</strong><br />
Parts for<br />
X-Wedge®<br />
2007-2013<br />
Parts for<br />
Victory®<br />
2003-2013<br />
Flathead Power® Cylinder Heads<br />
Description Part #<br />
Fully assembled heads 106-4929*<br />
Unassembled heads 106-2403*<br />
*Special Order: Download the Special Order Form at sscycle.com/soforms<br />
MSRP<br />
Call for Pricing<br />
Call for Pricing<br />
Racing<br />
Products<br />
Tools & Shop<br />
Supplies<br />
Dealer Services<br />
& Promo Items<br />
KN Series top end gasket kit<br />
Description Part #<br />
Does not include head gasket, order<br />
bore specific head gasket separately<br />
900-0493<br />
MSRP<br />
$109.95<br />
Replacement parts on page 5-106<br />
These fully assembled cylinder heads are ready to install. Complete with valves, guides,<br />
springs, tins, rocker arms, rocker shafts, knuckles and gaskets and intake adapters.<br />
Visit us at www.sscycle.com<br />
Warranty &<br />
Company Policy<br />
OEM Cross Reference<br />
Appendix & Index<br />
5-51
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