T143 Long Block Engine — 143 cu in, 4.625 in stroke, 4.425 in bore, 10.47:1, Black

S&S CYCLE T143 Long Block Engine — 143 cu in, 4.625 in stroke, 4.425 in bore, 10.47:1, Black – 07-17 Dyna, 10-11, 13-14, 16 Touring, 07-10, 12-14 CVO, 09-13, 15-16 Trike

S&S CYCLE
0901-0253
310-0837A
  • S&S B3 CNC-machined cylinder heads with two-bolt exhaust flanges.
  • S&S 635 gear drive cams and 1.725:1 rocker arms delivering .674" total lift.
  • S&S Super Stock T2 crankcases with reed breather valve and three-piece flywheels.
  • High-flow oil pump, premium tappets; made in the USA.
  • Does not include carb/intake or ignition; T143-specific or custom exhaust required.
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Built by S&S Cycle with premium components and precision CNC machining. 🇺🇸🔧

S&S B3 cylinder heads are CNC-machined and feature two-bolt exhaust flanges for reliable sealing and serviceability.

Includes S&S Super Stock™ T2 crankcases with a reed breather valve and three-piece flywheels, plus a high-flow oil pump and S&S premium high-performance tappets.

Fits in stock chassis with no cutting or frame modifications required; a T143-specific or custom exhaust is required for installation.

Does not include carburetor/intake or ignition system — these must be purchased separately. Not for twin cooled models and not recommended for trike models.

Revised oil routing on '99–'06 Touring models means an oil line installation kit is not required in some cases; otherwise installation requires the oil line kit.

: 0901-0253
In Stock

Data sheet

Type
Long Block
Units
Each
Color/Finish
Black
Brand
S&S CYCLE
Bore Size
4,425"
Displacement
143"
Stroke Length
4,625"
Compression Ratio
10.47:1
Harley Family
CVO
Dyna
Touring
Trike

This product fits the following vehicles. Use the filters below to narrow down the list if needed.

Manufacturer Model Family Year Notes
Harley Davidson Dyna Switchback Dyna 2012 O/C
Harley Davidson Dyna Switchback Dyna 2013 O/C
Harley Davidson Dyna Switchback Dyna 2012 O/C
Harley Davidson Dyna Switchback Dyna 2013 O/C
Harley Davidson Dyna Switchback Dyna 2014 O/C
Harley Davidson Dyna Switchback Dyna 2015 O/C
Harley Davidson Dyna Switchback Dyna 2016 O/C
Harley Davidson Road King Classic Touring 2014 O/C
Harley Davidson Road King Classic Touring 2016 O/C
Harley Davidson Road King Screamin Eagle CVO 2007 O/C
Harley Davidson Road King CVO 110th Anniversary CVO 2013 O/C
Harley Davidson Road King CVO CVO 2014 O/C
Harley Davidson Electra Glide Touring 2010 O/C
Harley Davidson Electra Glide Touring 2010 O/C
Harley Davidson Electra Glide Ultra Classic Screamin Eagle CVO 2007 O/C
Harley Davidson Electra Glide Ultra Classic CVO Touring 2013 O/C
Harley Davidson Trike Tri Glide Ultra Classic Trike 2009 O/C
Harley Davidson Trike Tri Glide Ultra Classic Trike 2010 O/C
Harley Davidson Trike Tri Glide Ultra Classic Trike 2011 O/C
Harley Davidson Trike Tri Glide Ultra Classic Trike 2012 O/C
Harley Davidson Trike Tri Glide Ultra Classic Trike 2013 O/C
Harley Davidson Street Glide CVO CVO 2010 O/C
Harley Davidson Street Glide CVO CVO 2012 O/C
Harley Davidson Trike Street Glide Touring 2010 O/C
Harley Davidson Trike Street Glide Touring 2011 O/C
Harley Davidson Freewheeler Trike 2015 O/C
Harley Davidson Freewheeler Trike 2016 O/C
Harley Davidson Road Glide Touring 2010 O/C
Harley Davidson Road Glide Touring 2010 O/C
Harley Davidson Road Glide Custom Touring 2010 O/C
Harley Davidson Road Glide Custom Touring 2010 O/C
Harley Davidson Road Glide Custom CVO CVO 2012 O/C
Harley Davidson Dyna Super Glide Dyna 2007 O/C
Harley Davidson Dyna Super Glide Dyna 2008 O/C
Harley Davidson Dyna Super Glide Dyna 2009 O/C
Harley Davidson Dyna Super Glide Dyna 2010 O/C
Harley Davidson Dyna Street Bob Dyna 2007 O/C
Harley Davidson Dyna Street Bob Dyna 2008 O/C
Harley Davidson Dyna Street Bob Dyna 2009 O/C
Harley Davidson Dyna Street Bob Dyna 2010 O/C
Harley Davidson Dyna Street Bob Dyna 2011 O/C
Harley Davidson Dyna Street Bob Dyna 2012 O/C
Harley Davidson Dyna Street Bob Dyna 2013 O/C
Harley Davidson Dyna Street Bob Dyna 2012 O/C
Harley Davidson Dyna Street Bob Dyna 2013 O/C
Harley Davidson Dyna Street Bob Dyna 2014 O/C
Harley Davidson Dyna Street Bob Dyna 2015 O/C
Harley Davidson Dyna Street Bob Dyna 2016 O/C
Harley Davidson Dyna Street Bob Dyna 2017 O/C
Harley Davidson Dyna Street Bob Dyna 2014 O/C
Harley Davidson Dyna Street Bob Dyna 2015 O/C
Harley Davidson Dyna Street Bob Dyna 2016 O/C
Harley Davidson Dyna Street Bob Dyna 2017 O/C
Harley Davidson Dyna Street Bob Limited Dyna 2013 O/C
Harley Davidson Dyna Street Bob Limited Dyna 2013 O/C
Harley Davidson Dyna Street Bob Limited Dyna 2013 O/C
Harley Davidson Dyna Street Bob Limited Dyna 2013 O/C
Harley Davidson Dyna Street Bob Special Dyna 2014 O/C
Harley Davidson Dyna Street Bob Special Dyna 2015 O/C
Harley Davidson Dyna Street Bob Special Dyna 2014 O/C
Harley Davidson Dyna Street Bob Special Dyna 2015 O/C
Harley Davidson Dyna Street Bob Limited Dyna 2016 O/C
Harley Davidson Dyna Street Bob Limited Dyna 2016 O/C
Harley Davidson Dyna Street Bob Factory Custom Dyna 2013 O/C
Harley Davidson Dyna Street Bob Factory Custom Dyna 2014 O/C
Harley Davidson Dyna Street Bob Factory Custom Dyna 2015 O/C
Harley Davidson Dyna Street Bob Factory Custom Dyna 2016 O/C
Harley Davidson Dyna Street Bob Factory Custom Dyna 2013 O/C
Harley Davidson Dyna Street Bob Factory Custom Dyna 2014 O/C
Harley Davidson Dyna Street Bob Factory Custom Dyna 2015 O/C
Harley Davidson Dyna Street Bob Factory Custom Dyna 2016 O/C
Harley Davidson Dyna Super Glide Custom Dyna 2007 O/C
Harley Davidson Dyna Super Glide Custom Dyna 2008 O/C
Harley Davidson Dyna Super Glide Custom Dyna 2009 O/C
Harley Davidson Dyna Super Glide Custom Dyna 2010 O/C
Harley Davidson Dyna Super Glide Custom Dyna 2011 O/C
Harley Davidson Dyna Super Glide Custom Dyna 2012 O/C
Harley Davidson Dyna Super Glide Custom Dyna 2013 O/C
Harley Davidson Dyna Super Glide Custom Dyna 2012 O/C
Harley Davidson Dyna Super Glide Custom 110th Anniversary Dyna 2013 O/C
Harley Davidson Dyna Super Glide Custom Dyna 2014 O/C
Harley Davidson Dyna Super Glide Custom Dyna 2014 O/C
Harley Davidson Dyna Fat Bob Dyna 2008 O/C
Harley Davidson Dyna Fat Bob Dyna 2009 O/C
Harley Davidson Dyna Fat Bob Dyna 2010 O/C
Harley Davidson Dyna Fat Bob Dyna 2011 O/C
Harley Davidson Dyna Fat Bob Dyna 2012 O/C
Harley Davidson Dyna Fat Bob Dyna 2012 O/C
Harley Davidson Dyna Fat Bob Dyna 2013 O/C
Harley Davidson Dyna Fat Bob Dyna 2014 O/C
Harley Davidson Dyna Fat Bob Dyna 2015 O/C
Harley Davidson Dyna Fat Bob Dyna 2016 O/C
Harley Davidson Dyna Fat Bob Dyna 2017 O/C
Harley Davidson Dyna Fat Bob Dyna 2012 O/C
Harley Davidson Dyna Fat Bob Dyna 2013 O/C
Harley Davidson Dyna Fat Bob Dyna 2014 O/C
Harley Davidson Dyna Fat Bob Dyna 2015 O/C
Harley Davidson Dyna Fat Bob Dyna 2016 O/C
Harley Davidson Dyna Fat Bob Dyna 2017 O/C
Harley Davidson Dyna Fat Bob CVO CVO 2009 O/C
Harley Davidson Dyna Fat Bob CVO CVO 2010 O/C
Harley Davidson Dyna Low Rider Dyna 2007 O/C
Harley Davidson Dyna Low Rider Dyna 2008 O/C
Harley Davidson Dyna Low Rider Dyna 2009 O/C
Harley Davidson Dyna Low Rider Dyna 2014 O/C
Harley Davidson Dyna Low Rider Dyna 2015 O/C
Harley Davidson Dyna Low Rider Dyna 2016 O/C
Harley Davidson Dyna Low Rider Dyna 2017 O/C
Harley Davidson Dyna Low Rider Dyna 2014 O/C
Harley Davidson Dyna Low Rider Dyna 2015 O/C
Harley Davidson Dyna Low Rider Dyna 2016 O/C
Harley Davidson Dyna Low Rider Dyna 2017 O/C
Harley Davidson Dyna Low Rider S Dyna 2016 O/C
Harley Davidson Dyna Low Rider S Dyna 2017 O/C
Harley Davidson Dyna Screamin Eagle CVO 2007 O/C
Harley Davidson Dyna Screamin Eagle CVO 2008 O/C
Harley Davidson Dyna Wide Glide Dyna 2007 O/C
Harley Davidson Dyna Wide Glide 105th Anniversary Dyna 2008 O/C
Harley Davidson Dyna Wide Glide Dyna 2010 O/C
Harley Davidson Dyna Wide Glide Dyna 2011 O/C
Harley Davidson Dyna Wide Glide Dyna 2012 O/C
Harley Davidson Dyna Wide Glide Dyna 2012 O/C
Harley Davidson Dyna Wide Glide Dyna 2013 O/C
Harley Davidson Dyna Wide Glide Dyna 2012 O/C
Harley Davidson Dyna Wide Glide Dyna 2013 O/C
Harley Davidson Dyna Wide Glide Dyna 2014 O/C
Harley Davidson Dyna Wide Glide Dyna 2015 O/C
Harley Davidson Dyna Wide Glide Dyna 2016 O/C
Harley Davidson Dyna Wide Glide Dyna 2017 O/C