Bad30th

iTrader: (13)

I found conflicting part numbers for GM MLS headgaskets, need to know which one please so I install the correct ones...

12589226

or

12498544

...or are they the same ?

Need them for my stock bore size Procharged 99 LS1.

Thanks !
Rob (Bad30th)

dynedta

iTrader: (4)

i used the 12498544

SSmokin 01

iTrader: (14)

I got mine (your first #) from TR.

20-12589226 GM Multi-Layer Steel LS1/LS6 Cylinder Head Gasket
http://thunderracing.com/catalog/?ac...vid=3&pcid=157

dynedta

iTrader: (4)

i wonder what the difference is in know the 12498544 is like 30bux and you get both gaskets

armyspeedfreek

iTrader: (1)

any one know im interested

SD99TA214

iTrader: (27)

bore size doesnt matter......which heads? 12610046 if your running 317s on your motor imo. you dont wana run 5.7 head gaskets on a 6.0 head. the seal ring will be INSIDE the chamber not outside.......if you got 5.7 heads go with SSmokin 01.

blazin

iTrader: (16)

Im putting a set of LS1 Heads 853s onto my 5.3 what gasket do I need?

Rick_Vor

iTrader: (36)

Without looking up the part numbers, I'm pretty sure the first pair are graphite and the other part numbers for a single head gasket are MLS (multi-layer-steel). GM switched to the MLS style quite a few years ago.

Rick