S&S Cycle

CNC PORTED CYLINDER HEAD SERVICES

FITMENT • Available for 1999–2017 big twin engines, except 2017 touring models • Ideal for 88"–124" engines (must use Screamin’Eagle® high flow injectors HD #27796-08 with stock throttle body, with kits over 107") • Not compatible with Twin-Cooled™ models FEATURES AND BENEFITS • CNC machined ports for a consistent performance increase from stock heads • Great throttle response, high velocity port without losing low RPM torque • Assembled with performance valves and springs ready to bolt-on • Choice of .585" or .650" lift valve springs • Combustion chambers are available in the following volumes: • 83cc—Generally used for stock 88" up to 106" engine displacements • 85cc—Same as stock Twin Cam 88® and 96™ engine displacements • 87cc—Recommended for up to 117" engine displacements • 90cc—Generally used for 124" and up engine displacements • Available in factory black or silver S&S CNC PORTING SERVICE OPTIONS REWORK SERVICE • Send your stock heads to S&S • Get the same set of heads back with CNC machined ports • The best option for heads with a special cosmetic treatment • Allow 1 week turn-around (does not include shipping) CUSTOM CNC PORT DUPLICATION • S&S can digitize your port design andmachine it in your heads, ask an S&S customer service rep for details

WATCH THE S&S CNC PORTING VIDEOS AT SSCYCLE.COM/VIDEOS

CNC PORTING SERVICE Fitment

Part #

1999–2017 big twins (except Twin-Cooled™ & 2017 touring models) 106-5880 DISCLAIMER: NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLE. NOT LEGAL FOR SALE OR USE NATIONWIDE ON ANY FEDERAL POLLUTION CONTROLLED MOTOR VEHICLE UNDER THE CLEAN AIR ACT

S&S® CNC PORTING SERVICE SPECIFICATION COMPARISON

VALVE SIZE

MAX TDC LIFT

PORT FLOW

Chamber Volume

Heads

Max Valve Lift

Intake 1.805" 1.900"

Exhaust

Intake

Exhaust

Intake

Exhaust

Stock

1.575" 1.610"

.585" .650"

–

–

216.2 cfm 191.8 cfm

85cc

CNC Ported by S&S

.230"

.215"

248.6 cfm 209.7 cfm 83cc**

*Flow testing performed on a SuperFlow® 1020 flow bench at 28" of water test pressure at .600" lift. Heads tested are 2006-'12 style.

COMPRESSION RATIO

Heads

88"

95"

96"

97"

103" 10.1:1 10.3:1

106" Stroker

106" Big Bore 117" DD Piston 124" DD Piston

Stock

9.0:1 9.2:1

9.2:1 9.4:1

9.2:1 9.4:1

9.7:1 9.9:1

10.1:1 10.3:1

10.0:1 10.2:1

10.0:1 10.2:1

10.7:1 10.9:1

CNC Ported by S&S

**As a general rule of thumb, for every 1cc decrease in chamber volume equals a .1 increase in compression ratio.

CNC porting is not available for previously ported heads, heads that have been structurally damaged, or heads that are determined to be unserviceable during initial inspection. These heads will be returned to the customer without modification. In these cases, the customer will be notified and options will be reviewed. New, CNC ported stock heads or S&S heads are available for purchase. Due to variations in stock cylinder head castings, all inside surfaces of the ports may not "clean up" during machining. As a result, the inside of one or more ports may not appear to be completely machined. This does not effect performance and is not considered a defect. Fuel injection tuning required. CNC porting is not currently available for Harley-Davidson® CVO engines or Screamin' Eagle® cylinder heads. Must use Screamin’Eagle® high flow injectors, HD #27796-08, with kits over 106" with stock throttle body S&S recommends using a S&S Throttle Hog throttle body when installing S&S CNC ported heads to achieve full horsepower performance potential. See page 107. NOTES

104 Order 608-627-1497 S&S Late Models 1999–up