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

1999-'06

Phone: 608-627-1497

The BIGGEST, BADDEST, bolt-in for a Stock Frame. The S&S T143 Long Block engine is the largest S&S engine that will fit in a stock Harley-Davidson® chassis At double the HP of a stock motor the power of the T143 requires technical expertise for the installation and tuning along with an expe rienced rider This is an ultra performance/race engine Longevity, en gine noise, vibration and throttle sensitivity have all been compromised to reach this level of performance while fitting in a stock chassis and as such is not suitable for every situation It is the purchaser's responsibility to consider the suitability for their application Engine noise and damage from abuse is not covered under warranty

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

Fitment • 1999–2006 Harley-Davidson® touring models • 1999–2005 Harley-Davidson® Dyna® models

Features and Benefits • Fits in stock chassis – no cutting or frame modifications • S&S B3 cylinder heads CNC machined with 2 bolt exhaust flanges • 3 Piece Flywheels • TC3 Oil Pump and Cam Plate • S&S 635 Easy Start Gear Drive Cams and S&S 1 725:1 rocker arms for 674" total lift • S&S Precision Tappets

T143 Engines without Fuel and Ignition Systems Chassis Style Displacement Bore

Piston Type

Compression Ratio

Warranty Period

Stroke Cam

Finish

Part #

1999–'06 touring models 1999–'05 Dyna® models

Wrinkle Black

310-0737A

S&S Forged Flat Top

143"

4 425" 4 625" 635

10 5:1

1 year

1999–2006 bt (except '06 Dyna®)

Black Edition 310-0833A

FOR CLOSED COURSE COMPETITION USE ONLY. NOT INTENDED FOR STREET USE. LEGAL IN CALIFORNIA ONLY FOR RACING VEHICLES WHICH MAY NEVER BE USED, OR REGISTERED OR LICENSED FOR USE, UPON A HIGHWAY. NOT LEGAL FOR SALE OR USE NATIONWIDE ON ANY FEDERAL POLLUTION CONTROLLED MOTOR VEHICLE UNDER THE CLEAN AIR ACT.

T-Series engines are not compatible with HD® Softail® models No fuel system available for 1999–2001 Magnetti Morelli EFI models

The T143 will require a custom made exhaust

Installation Parts Description

Part #

Super G Carburetor Kit w/air cleaner* 110-0120 * Air cleaner assemblies included with these carburetor kits do not include air cleaner covers. Stock 1999-later air cleaner or any S&S Stealth air cleaner covers may be used.

Induction Kits Description

Part #

2002-'05 Dyna® & touring models 170-0289 2006-'07 touring models 2007-17 Dyna models 170-0288

70mm Induction Kit

170-0288

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

110-0120

3-19