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stock ls1 piston ?

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Old 09-26-2010, 09:47 AM
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Default stock ls1 piston ?
I was looking at some of my pistons this morning out of my 2002 z28 and noticed they had "MAHLE" stamped on the inside of the skirts . did nahle make the pistons for GM to use or were they added to the motor later
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Old 09-26-2010, 09:55 AM
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As far as I know those would be a set of aftermarket pistons, but probably stock size
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Old 09-26-2010, 10:43 AM
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they have flat tops and 3 rings and the numbers 56/22 on the piston head
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Old 01-22-2020, 07:09 PM
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Originally Posted by 1baaadz28
they have flat tops and 3 rings and the numbers 56/22 on the piston head
I finished tearing mine down today and saw the same thing. It's got mahle pistons in it.
i can tell you this bottom end has not been apart. 103k
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Old 01-22-2020, 09:27 PM
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I've heard that Mahle supplied OEM pistons for many GM engines. Still might..
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Old 01-24-2020, 04:30 PM
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Originally Posted by G Atsma
I've heard that Mahle supplied OEM pistons for many GM engines. Still might..
I think this is correct.
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Old 01-26-2020, 01:07 PM
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The Mahle catalog does list the original LS1 pistons, which are discontinued. They do still make a version with reduced compression height. Also they're aluminum like the originals, not hypereutectic (sp?) aluminum.
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Old 01-26-2020, 01:47 PM
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MAHLE was what I pulled out of my factory LS1.
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Old 01-27-2020, 01:19 PM
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Mahle was the OEM piston supplier for the LS1. Had they just gave us a little bit more top ring land thickness!
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Old 01-27-2020, 01:47 PM
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Originally Posted by BlwnLs1GTO
Mahle was the OEM piston supplier for the LS1. Had they just gave us a little bit more top ring land thickness!
Yea I know. thats why i put another engine in mine. could have just moved the rings down a tad.
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