Here is some information from Ben on the C63

"okay my car is on the tow truck on its way back from renntech ... after doing the new updated ecu program they got and custom headers done by them took 1 week to make and taking out carbon filters .. the car dyno'd
from 374 to the rear to 431 (from 462 factory to 533 HP RENNTECH) .... i have a dyno when my car arrive ill post a scan of it and do a few little videos cant wait for it to ARRIVE !!! ... oh 374 was my factory dyno with no carbon filters ... oh for the dyno guys .. this was dyno'd on my 20" hre m40 ..."

 

that's nice! kevin, did you see that other thread about some tuning company getting 120 more hp (crank) out of this engine without FI?

 

I did actually. Very interesting.

 

yeah but none has see this for real i believe ....no dyno to me equals fairy tail ..!! i wish it was true ..lol..

 

i'm a bit skeptical myself, but it true, wow! i just picked up an e63 last night so i'm crossing my fingers.

 

time for you to start modding your 63!

 

i'm already looking at the options...

 

Here is the Dyno sheet

 

Very impressive, I was satisfied with the stock out put yours is a monster look at how much torque you got. The oem setup has gobs of it down low.

 

This thing hauls ass!!!!! After driving this car stock , and last night going to dinner after it was RENNtech'd HOLY SHIT it PULLS!!!!!!!! The best part is the girls talking and then they shutup when you stomp it . Its a great feature if your chick talks to much just RENNtech it and they shutup!!!!! PRICELESS!!!