Quote Originally Posted by GTPpower View Post
I've seen 7/8 chains stretch with 300whp. They are little if any stronger than stock.

Gxp chains are holding 600whp on a few cars. 500whp is about their comfortable limit though.
That doesnt seem to match what TEP ZZP and a few other sources have said.

On a similar note, GM used the GXP chain for all stock chain replacements after a certain year, so if you buy a stock gemenai chain set its most likely the GXP chain.