Does anybody have the GM part numbers for the pistons and pistons rings for the L92 and the LS3? Are they the same piston in each engine, or is the LS3 more "special"? I'm thinking of building a budget LS3 to replace my recently ventilated LS1. Thanks!

Brian

 

The L92 and LS3 use different part numbers.

L92 piston - 89018047

LS3 piston - 19168089

 

Thank you, very much! I'm assuming there's a difference between the two. Anybody know what is different? Price is different, unless just "corvette tax".

 

if i remember correctly the LS3 piston gives a higher compression ratio...not sure if theres a difference in materials or weight

 

Totally different from piston casting to rings also coated skirts. New wrist pins (stronger lighter) also new rods & rod bolts. Rod bolts same as LS7 uses also much stronger. New rings that seal better also better oil drain holes on the bottom ring. Blocks, crank & bare heads are the only thing the same.

 

i think the rods and cap screws are the same.

 

my sources indicate that this number has been updated to 19178597

thought id post this since i couldnt find it anywhere