MBWorld.org Forums - my s600 amazing dyno results or weird ?

Hi Sup guys

so yesterday i went to dyno my car b4 i sell it to see how much i am putting to the ground

my car is an s600 2003 with 115000 km on it

mods are
1- gutted cat + resonater delete
2- k&n drop in air filter
3- bosch 010 upgraded ic pump

first thing i did was cooling the engine for 15 - 20 min

via a big fan

then put it on dyno mode

run was made on a mainline dynamometer it has 2 readings

dyno jet + mainline

on dyno jet readings i got ( 491 rwhp ) yes 491 is this normal ?

on mainline readings i got ( 416 rwhp )

my car is running a bit rich AFR 10.02

what do you think