S&S Cycle - S&S Performance Parts 2025 L - Volume 67

1999-'06

www.sscycle.com

Fitment • 1999–'05 big twins (2006 model year heads can be found in Section 2) Features And Benefits • Heads can be decked up to 060" to increase compression • 79cc heads have 1 940" intake and 1 575" exhaust valves • 89cc heads have 2 000" intake and 1 605" exhaust valves • 91cc heads have 2 000" intake and 1 605" exhaust valves • S&S 585" or 650" lift valve springs

• Stock bolt pattern heads include rocker base gaskets • Stock Harley-Davidson® rocker boxes can be retained if S&S Easy Start cams are used Must use S&S valve cover gasket kit part # 90-4120 with stock rocker covers Options • With or with out compression release machining

1 -2017-UP 2- 2007-'17 3 -1999-'06 4 -1984-'99 5 -1936-'84 6 -XL-RA1250 7 -BELTS & GASKETS 8 -TOOLS 9 -WARRANTY 10 -APPENDIX 79cc 89cc 91cc

(Compression release machining is for S&S compression releases) • Silver powder coat or wrinkle black powder coat finish

Compression Ratios For S&S® Super Stock® Cylinder Heads For 1999–'06 Big Twins Configuration 88" 95" 97" Big Bore 103" 106" Stroker

110"

111"

117"

124"

9 6:1

9 6/10 4:1* 10 3

10 2/11 1* 9 3/10 1*

10 7

-

– –

– –

– –

8 3

8 7/9 3*

9 4

9 8

9 8 9 6

–

–

–

–

–

9 75

10 2

10 4

*S&S pop-up piston

Stock Bolt Pattern* S&S® Super Stock® Cylinder Head Kits For 1999-2005 Big Twins

Compression Release Machining

Chamber Volume

Manifold Surface

Fitment

Springs

Finish

Part #

•

650" 585" 650" 585" 650" 650" 585" 650"

106-4277 900-0254

Silver

106-4277

79cc

•

90-1293

Wrinkle Black

1999–'05 bt

900-0251

• •

Silver

106-4270

89cc

Wrinkle Black Wrinkle Black

90-1106

900-0410 900-0465 900-0470

Silver

S&S T124 Engines

91cc

+032

90-4120 S&S valve cover gasket kit # 90-4120 must be used with stock rocker covers. Included with Stock Bolt Pattern Super Stock® Head Kits.

650

Wrinkle Black Wrinkle Black

S&S T111 Engines 91cc 900-0480 *All stock bolt pattern Super Stock® head kits include S&S valve cover gasket kit part # 90-4120 for use with stock rocker covers 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 - 064 585"

S&S® Bolt Pattern S&S Replacement Cylinder Head Kits For S&S T-Series Engines For 1999–'06 Big Twins

Chamber Volume

Compression Release Machining

Description

Springs

Finish

Part #

S&S® T-Series Engines 41/8" Bore

•

91cc

650" lift

Wrinkle Black

90-1371

Top End Gasket Kits For 1999–'06 Big Twins 37/8" & 3 927" Bore 4" Bore

S&S 41/8" Bore (Graphite)

Stock 41/8" Bore (Layered Steel)

910-0465

90-1913

90-1910

90-1914

Includes a set of head and base gaskets, exhaust gaskets and o-rings.

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