Harley-Davidson SOFTAIL STANDARD Big Bore Kits

Genuine HD big bore kits and aftermarket alternatives that fit the SOFTAIL STANDARD — all years. Select your year for exact fitment and pricing.

Select your year for exact fitment & prices

2024 2023 2022 2021 2020 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1990 1989 1988 1987 1986 1985 1984

Genuine Harley-Davidson (16)

Genuine Harley-Davidson

Screamin' Eagle Stage II Bolt-On Power Kit

92500075A

Iron Pass £474.05£557.71View

Genuine Harley-Davidson

3-7/8" Standard Bore Piston Kit

22144-08B

Iron Pass £323.92£381.08View

Genuine Harley-Davidson

Screamin' Eagle 4-Inch Big Bore Conversion Kit

92500039

Iron Pass £1148.32£1350.96View

Genuine Harley-Davidson

Big Bore Head Gasket Kit

16101-01

Iron Pass £48.25£56.76View

Genuine Harley-Davidson

Screamin' Eagle 103 Stage IV Performance Kit

27516-08F

Iron Pass £2467.89£2903.40View

Genuine Harley-Davidson

Screamin' Eagle 131CI Stage IV Performance Kit

92500095

Iron Pass £3212.39£3779.28View

Genuine Harley-Davidson

Screamin' Eagle MVA CNC Ported Cylinder Heads

16925-11

Iron Pass £1422.25£1673.23View

Genuine Harley-Davidson

Flat-Top Cast Pistons, 3-7/8" Std Bore, 1550cc

22851-99A

Iron Pass £229.10£269.53View

Genuine Harley-Davidson

Screamin' Eagle Milwaukee-Eight 117 Stage IV Kit

92500073

Iron Pass £2589.05£3045.94View

Genuine Harley-Davidson

Stage II Bolt-On Performance Upgrade Kit

92500058A

Iron Pass £447.71£526.72View

Genuine Harley-Davidson

Screamin' Eagle Stage 2 Bolt-On Power Kit

92500074A

Iron Pass £474.05£557.71View

Genuine Harley-Davidson

Screamin' Eagle 114CI Stage IV Upgrade Kit

92500062

Iron Pass £2589.05£3045.94View

Genuine Harley-Davidson

Screamin' Eagle Stage 2 Bolt-On Power Kit

92500047A

Iron Pass £447.71£526.72View

Genuine Harley-Davidson

Screamin' Eagle 4-3/8 Inch Stroker Flywheel Assembly

23727-07A

Iron Pass £1210.83£1424.50View

Genuine Harley-Davidson

High-Compression Piston Kit, 4.060", Standard Bore

22574-10

Iron Pass £370.46£435.83View

Genuine Harley-Davidson

Screamin' Eagle 128CI Stage IV Performance Kit

92500094

Iron Pass £3212.39£3779.28View

Aftermarket for your SOFTAIL STANDARD

Confirmed to fit your SOFTAIL STANDARD

Aftermarket big bore kits the supplier lists against the SOFTAIL STANDARD. Genuine Harley-Davidson is listed above, not here.

S&S Cycle

S&S BIG BORE GASKETS FOR MILWAUKEE EIGHT

In stock

Iron Pass £101.89£119.87View

S&S Cycle

S&S 131CI & 136CI BIG BORE STROKER CYLINDERS FOR MILWAUKEE EIGHT

In stock

Iron Pass £1329.99£1564.69View

S&S Cycle

S&S 4.32" BIG BORE KITS FOR MILWAUKEE EIGHT

In stock

Iron Pass £1329.99£1564.69View

S&S Cycle

S&S 4.32" BIG BORE KITS FOR MILWAUKEE EIGHT

In stock

Iron Pass £1329.99£1564.69View

S&S Cycle

S&S 4.32" BIG BORE KITS FOR MILWAUKEE EIGHT

In stock

Iron Pass £1294.39£1522.81View

S&S Cycle

S&S 4.32" BIG BORE KITS FOR MILWAUKEE EIGHT

In stock

Iron Pass £1329.99£1564.69View

S&S Cycle

S&S 131CI & 136CI BIG BORE STROKER CYLINDERS FOR MILWAUKEE EIGHT

In stock

Iron Pass £1262.03£1484.74View

S&S Cycle

S&S 131CI & 136CI BIG BORE STROKER CYLINDERS FOR MILWAUKEE EIGHT

In stock

Iron Pass £1329.99£1564.69View

James Gaskets

JAMES 3 5/8" BIG BORE HEAD GASKETS FOR 1966-1984 SHOVELHEAD

In stock

Iron Pass £33.65£39.59View

V-Twin

3 5/8" BIG BORE CYLINDERS AND PISTONS FOR EVOLUTION BIG TWIN

In stock

Iron Pass £378.40£445.18View

V-Twin

3 5/8" BIG BORE CYLINDERS AND PISTONS FOR EVOLUTION BIG TWIN

In stock

Iron Pass £285.40£335.76View

S&S Cycle

HIGH COMPRESSION 132CI & 136CI BIG BORE KITS

In stock

Iron Pass £1368.64£1610.16View