place fuel rail back in the box and mark
return to sender seriously, ...i'd contact them and ask for instructions...stock fuel rails are a no-brainer and no instructions are needed...
I hope you didn't buy those thinking you'll be gaining HP or anything like that......
while thier claims have
some merit, they have never, ever backed up thier claims with testing and posted it....
the stock rails been used on motors getting close to 160+ HP...they might be good for more, but most people swap over to individual throttle bodies after a certain point....