Bama99z

iTrader: (7)

Trying to gather some information on the factory GM flywheel. Anyone know what horsepower that the are rated or good for?

FirstYrLS1Z

iTrader: (4)

Flexplates do not have a horsepower rating !!!
There was a 'design' change during the 99-00 ? years. Prior to that,the flexplate had the large round holes,the change introduced 'peanut shaped' holes and that design has been a failure. The later design when they fail were replaced by the earlier design and GM stock is zero and no longer available.

https://ls1tech.com/forums/automatic...s-b-m-ect.html

https://ls1tech.com/forums/automatic...placement.html

https://ls1tech.com/forums/automatic...flexplate.html

01ssreda4

iTrader: (96)

TCI all the way if your budget can afford it. Piece of mind can be priceless sometimes.