is there someone who knows PES tuning http://www.pes-tuning.com/
You might just wanted to search PES on this forum alone. I wouldn’t give them any money. That car that PES used to develop that kit if you can call it that has had nothing but issues from claimed blown motor to the car running like shit when it actually runs just like every other PES car. Its a waste of money.
Not only that but the performance times that they posted are not much faster than if you had a JHM tuned car with not cats. It over all is shit.
Here is a post with just some of the PES fail. I posted this and am just copying it over here
OMG tony at PES is still alive… PES isnt even a busniess anymore really. That dude ran off with tons of peoples money annd that car in the picture is just one more in the list of PES is shit and DONT EVER buy anything they make.
They fucked up that S8 car and fucked that dude over those numbers look terrible Im suprised they posted them and like you mentioned they took a small gain and used inflated crank hp numbers to try and make this look like less of a fail… for about a year you only saw a picture because the car only ran for a short time till they blew it up just like the other 15 cars they took money from people for and blew them up or ran off with the money to never give customers anyting. PES is PURE SHIT…but they will or tony will lie like hell to get your money… here are just a few PES classics honestly I can post PES horror stories all day long there is that many
Several people who got ripped off by PES went to the adress listed. Now you will see they dont list an adress on there web site if its still up and thats because they dont have one. this was the building for PES as listed on there web site
http://audirevolution.net/forum/index.php?topic=2504.msg69945#msg69945
Here is the latest PES Rand D car where they fucked this guy over and blew up his car. Worst part was just like all of the other PES supercharger kits in the past. The car was slow as hell.
http://audirevolution.net/forum/index.php?topic=2772.0
Several people have had PES take there money and Poof PES vanishes. PES is notorious for taking deposits on parts that not only dont exsist they havent even been made YET.
http://audirevolution.net/forum/index.php?topic=2504.msg69824#msg69824
Just more bad press for PES
http://audirevolution.net/forum/index.php?topic=2504.0
This is what we see about 90% of the time. People get suckered into PES and then sell the car right after they get the kit.
http://www.audizine.com/forum/showthread.php/357360-The-real-deal-on-PES-tuning-you-guys-should-love-this
http://audirevolution.net/forum/index.php?topic=874.0
This is just a few quick links I found in like 10 seconds of looking. Doing a long search for PES will all tell you the same thing that the car in the picture tells. PES took that guys money told him they had a supercharger when they only had a crude cad drawing only to use the dudes car for R and D with a kit that fucked up dudes car. But you never get the full story till these guys sell the car because if they talk bad while there car is messed up PES wont help them. Now that PES can afford to fix the cars they mess up but in the end EVERY PES kit has sucked for performance.
Not saying anyone wants a supercharger for there V10 but if you do contact JHM they have a V10 kit in the testing phases from what I understand.
If you want to blow money on a s/c call JHM. I want to see a supercharged c6 s6 or d3 s8. Surprised it hasn’t happened yet 
In terms of PES I am surprised that guy is still around. I am also surprised the recent s8 running the kit hasn’t blown up again, there is a local rs4 running a PES supercharger. Also hasn’t blown yet. Maybe the tunes are better, but from all of he above I wouldn’t touch with a 12 foot pole.
Think it was answer enough . Have written with the jhm but they do not have anything sc for S6 . Should I make hedders instead To get kw ??
JHM V10 S/C kit is in development. Not sure when you’ll be able to buy one. Headers would be the best bet in the interim I’d think.
Is there anyone who make hedders for the car or should I make them
I’m shocked these fraudulent bitches are still around. Piece of Expensive Shit. In fact not only is it a useless kit maybe gain 40 crank hp, it will likely damage your engine
Depends where you are. You do realize the motor needs to be dropped to fabricate and install right?
A few people have done custom setups, you could try messaging countvohn, he’s great but might be pretty busy for good reason though 
Yes i know the engien should must out . I need new chain in the engien so needs to take it out . I live in danmark so a little bit far from the Unaited states :)But i could use some good advidce to build heeders . I have a small stainless steel company so pippe work is no problem .But i don t know what s important .
I would suggest you too talk to countvohn as he has successfully made good headers for several Audis that have been proven on the street and on the dyno .
You can get some really good power from getting a few simple bolt on parts. check out JHM and there parts.
https://www.youtube.com/watch?v=WIFddsRcMp4
You can save some big money if you pull out your cats. Getting headers made will give you the best results but just making longer primary pipes won’t yeaild big enough gains to make it worth your time. you really need to do several things in the header design to maximize the potential of headers.
How do I add a picture ??
I would poste a picture to this thread dut i could not. my question is whether you can remove the cat without it giving problems ???
Yes u can remove, Greg on here just did that on his s8. But you need a tune to maximize this and remove the cel.
correct. I have a constant CEL on because the post O2 sensors are not seeing any converting going on. Engine runs just fine. Tune will help take advantage of the extra flow.
Thanks for all the answers super to be able to ask so I’m free to make too many mistakes