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Kohler Piston Kits

When selecting piston kits make sure you select the correct design on all K Series and Magnum engines.

 

There are 2 basic designs, the Old Style piston and the New Style (Mahle) piston. If you have the Old Style piston and you are Not replacing the rod you have to stay with the Old Style piston design.
If you want to upgrade to the better New Style (Mahle) piston you can but you have to also replace the rod with the New Style rod.
The Mahle style piston skirt profile was modified to provide a better fit within the cylinder bore. The ring channels were redesigned and the wrist pin was strengthened. A different connecting rod is required because of the extensive design changes.
Beware of shops selling the aftermarket "rebuild kits" more then likely these are imports. These parts in many cases will not inter-change with genuine Kohler parts, example aftermarket rings will not fit in genuine Kohler pistons. They are also selling the old style piston design, further they are also claiming "It's what the rebuilders use". In my 30 plus years in the power equipment industry I have never heard of the term "rebuilders" in the small engine business unless they may be referring to backyard mechanics that are using aftermarket internal engine parts. You may be saving in price but not Quality.




Manufacturer Model+ Item Name Product Image Price
Kohler 4187406S

Kohler Part # 4187406S Piston Kit W/Rings Set .003

KIT, PISTON W/RINGS SET .003 4187406S / 4187406 OLD STYLE
Kohler Part # 4187406S Piston Kit W/Rings Set .003  $192.34$245.69
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Kohler 4187407S

Kohler Part # 4187407S Piston Kit W/Rings Set .010

PISTON KIT W/RING SET .010 4187407 / 4187407S OLD STYLE
Kohler Part # 4187407S Piston Kit W/Rings Set .010  $199.95$271.67
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Kohler 4187408S

Kohler Part # 4187408S Piston Kit W/Rings .020

PISTON KIT W/RINGS .020 4187408 / 4187408S OLD STYLE
Kohler Part # 4187408S Piston Kit W/Rings .020  $188.26$215.46
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Kohler 4187409S

Kohler Part # 4187409S Piston Kit W/Rings .030

PISTON KIT W/RINGS .030 4187409 / 4187409S OLD STYLE
Kohler Part # 4187409S Piston Kit W/Rings .030  $245.00$282.57
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Kohler 4187410S

Kohler Part # 4187410S Piston W/Rings Set Std Mahle Kit

KIT, PISTON W/RINGS SET STD 4187410S / 4187410 New Style Mahle Piston Design For K181
Kohler Part # 4187410S Piston W/Rings Set Std Mahle Kit  $145.00$223.04
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Kohler 4187412S

Kohler Part # 4187412S Piston W/Rings Set .010 Mahle

PISTON W/RING SET .010 4187412S New Style Mahle Piston.
Kohler Part # 4187412S Piston W/Rings Set .010 Mahle  $140.04$215.43
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Kohler 4187414S

Kohler Part # 4187414S Piston W/Rings Set .030 Mahle

PISTON W/RING SET .030 4187414S New Style Mahle Piston.
Kohler Part # 4187414S Piston W/Rings Set .030 Mahle  $140.22$215.69
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Kohler 4587401S

Kohler Part # 4587401S Piston Kit W/ Ring Set Std

KOHLER PISTON KIT W/ RING SET STD 4587401 / 4587401S Used in K341, M16 Replaces: 4507461, 4507456, 4507448, 4507441, 4507431, 4507421, 4507411, 4507401 Old...
Kohler Part # 4587401S Piston Kit W/ Ring Set Std  $320.00$379.21
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Kohler 4587402S

Kohler Part # 4587402S Piston W/Rings Set .003

PISTON W/RING SET .003 4587402S Used in K341, M16
Kohler Part # 4587402S Piston W/Rings Set .003  $332.00$445.69
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Kohler 4587403S

Kohler Part # 4587403S Piston W/Rings Set .010

PISTON W/RING SET .010 4587403S
Kohler Part # 4587403S Piston W/Rings Set .010  $350.00$418.04
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Kohler 4587404S

Kohler Part # 4587404S Piston Kit W/ Ring Set .020

KOHLER PISTON KIT W/ RING SET .020 4587404 / 4587404S Used in K341, M16 Old style piston design
Kohler Part # 4587404S Piston Kit W/ Ring Set .020  $360.00$463.53
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Kohler 4587406S

Kohler Part # 4587406S Piston W/Rings Set Std

PISTON W/RING SET STD 4587406S
Kohler Part # 4587406S Piston W/Rings Set Std  $355.00$450.87
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Kohler 4587408S

Kohler Part # 4587408S Piston Kit W/ Ring Set .010

KOHLER PISTON KIT W/ RING SET .010 4587408 / 4587408S
Kohler Part # 4587408S Piston Kit W/ Ring Set .010  $355.00$450.87
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Kohler 4587409S

Kohler Part # 4587409S Piston W/Rings Set .020

PISTON W/RING SET .020 4587409S
Kohler Part # 4587409S Piston W/Rings Set .020  $355.00$450.87
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Kohler 4587410S

Kohler Part # 4587410S Piston W/Rings .030 Kit

KIT, PISTON W/RINGS .030
Kohler Part # 4587410S Piston W/Rings .030 Kit  $355.00$450.87
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Kohler 4587411S

Kohler Part # 4587411S Piston With Rings Set Std Mahle

Kohler Piston With Rings Set Std Mahle New Design 45 874 11-S Used K341, M16 engines Discontinued by Kohler, no longer available.  
Kohler Part # 4587411S Piston With Rings Set Std Mahle

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Kohler 4587413S

Kohler Part # 4587413S Piston W/Rings Set .010 New Style Mahle

Piston With Rings Set .010 New Style Mahle 4587413-S / 45 874 13-S No Longer Available
Kohler Part # 4587413S Piston W/Rings Set .010 New Style Mahle $334.75

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Kohler 4587414S

Kohler Part # 4587414S Piston Kit W/ Ring Set .020 New Style Mahle

KOHLER PISTON KIT W/ RING SET .020 NEW STYLE MAHLE 4587414-S    
Kohler Part # 4587414S Piston Kit W/ Ring Set .020 New Style Mahle  $350.00$417.22
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Kohler 4587415S

Kohler Part # 4587415S Piston W/Rings Set .030 New Style Mahle

PISTON W/RING SET .030 NEW STYLE MAHLE 4587415 / 4587415S This part has been discontinued by Kohler. No longer available.
Kohler Part # 4587415S Piston W/Rings Set .030 New Style Mahle

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Kohler 4687401S

Kohler Part # 4687401S Piston W/Rings Set Std

PISTON W/RING SET STD 4687401S
Kohler Part # 4687401S Piston W/Rings Set Std  $178.93$194.00
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Kohler 4687402S

Kohler Part # 4687402S Piston W/Rings Set .003

PISTON W/RING SET .003 4687402S
Kohler Part # 4687402S Piston W/Rings Set .003  $208.90$304.43
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Kohler 4687403S

Kohler Part # 4687403S Piston W/Rings Set .010

PISTON W/RING SET .010 4687403
Kohler Part # 4687403S Piston W/Rings Set .010  $202.30$233.28
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Kohler 4687404S

Kohler Part # 4687404S Piston Kit W Ring .020

KOHLER PISTON KIT W RING .020 4687404 K91
Kohler Part # 4687404S Piston Kit W Ring .020  $245.00$304.43
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Kohler 4687405S

Kohler Part # 4687405S Piston W/Rings Set .030

PISTON W/RING SET .030 4687405S
Kohler Part # 4687405S Piston W/Rings Set .030  $208.90$226.49
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Kohler 4787402S

Kohler Part # 4787402S Piston W/Rings Set .003

PISTON W/RING SET .003 4787402S Used in K241, K482, 10 Replaces A235567, A235112, 4707412
Kohler Part # 4787402S Piston W/Rings Set .003  $330.00$387.51
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