Dyno results are in for 2nd cat X pipe
For both dyno's I've done at RENNtech, my charcoal filters had been removed. Not sure if all the gains can be solely attributed to the high-flow cats, but either way, my car dyno'd higher. https://mbworld.org/forums/3896643-post58.html
Last edited by sflgator; Jan 29, 2010 at 03:47 PM.
Last edited by NickZag; Jan 30, 2010 at 08:31 PM.
There are many ways to go about this, our way, or the muffler shop chop/hack/weld, however everyone will have their opinions as to what is right for them, and I am no one to judge. I just feel that if you buy a nice car like a C63, it is a travesty to hack/chop your car at a muffler shop (no offence guys), but some will still do it, and that might be ok for them.
Basically boils down to this. I have only shown the LOWEST gains we have ever seen, NOT the highest, nor the biggest differential of lowest stock HP vs the highest Xpipe hp gain. I have posted the highest stock HP vs the lowest gain our Xpipe has seen, to ensure something for us... No matter what, the gains "actual" that will be attained are beyond our "claims", and EVERY, I mean EVERY customer of our product have been nothing but pleased, if there was a single person unhappy, I would gladly give them 100% money back, no questions asked. To this date, no one has taken me up on the offer..I do however have references of many happy customers willing to speak to anyone here about their experience with us and our products. Our product is MINIMALLY invasive, easy to install and a complete PROVEN product tested on the dyno and on the track.
Judge for yourselves, we stand behind what we do..We RACE/PROVE/DYNO our parts, no ands if's or buts.
This is what we've done for the past 15 years, and we're not changing!
The Best of Mercedes & AMG
the car...i dont really know how to describe it...She sounds soooo much more refined at lower rpms ( < 4k), and hopefully i dont get destroyed for offering this comparison, but almost Italian-like.....above 4k She maintains the beast quality that we all love, slightly louder
the resonator was not removed so its not ridiculously loud
Can you remove the resonator if you want it louder and does this make the job more difficult?
So people use K&N in place of them?
Is this the correct K&N for our car?
http://www.knfilters.com/search/prod...x?Prod=33-2405
But first would you tell me how much louder they are than stock? I want my car to be louder.
Also, I know you already said that you haven't tried if they work with LT headers, but would there be any fitment issues regarding them?
But first would you tell me how much louder they are than stock? I want my car to be louder.
Also, I know you already said that you haven't tried if they work with LT headers, but would there be any fitment issues regarding them?
They do make the car louder than stock. We do have a R-1 which removes the resonator, and no it does not make things harder install wise.
LT's fitment issues, again, not sure, I've not tried so I can't say for sure.
This is no way is advocating the removal of smog components, and is only meant for testing purposes.
Test conditions:
Baseline fully stock 91 Oct vs
GT PRO's new product called the "Single X" secondary cat delete for C63. (yes it is totally removable and your cats can be reinstalled after the test)
Baseline best (not lowest#, but HIGHEST # baseline was used)
Test was also performed with charcoal filter removed as well. (we saw 10hp 7tq on this mod alone)
We picked up 15RWHP and 19TQ, but the best part is that in the mid range we're picking up 25RWHP and 27tq, the mods also show a gain everywhere in the curve.
I hope you guys like it. We will be doing a formal release of the "Single X" and "Double XX" by this weeks end.
https://www.ebay.com/i/233034600034?...BoC0nkQAvD_BwE
sorry that might be the wrong style...maybe resonator delete.
is MBH still in business?
https://www.mbhmotorsports.com/produ.../c63-oem-xpipe
Last edited by hachiroku; Sep 17, 2020 at 06:53 PM.
I can buy all of the parts to make one, pre-bent for like less than $200 on amazon. It just involves some sectioning and welding.
The luxury tax on these cars is intense.










