I'm looking forward to number. I think an exhaust bypass is good, but I'm reluctant to believe many tunes on this car at this point.

 

M&M are one of the best HP exhaust manufacturers,so it will be ok for the 4L
Also they have al the features I need.

 

The FVD M&M exhaust and ECU reprog I ordered are specific for 4 L

 

Post up some specs and dyno information.

 

Aye it's easier to loose hp with header/cat combos and lowering the back pressure on these cars! Moving the location of the 02 sensors etc... changes things considerably in terms of what the ECU is calling for...

 

Cargraphic is among the very best along with GMG and Akra

 

Here is the link,they are very nice and specially made for 4 L

http://www.fvd.de/us/en/Porsche-0/997_GT3-141-34/-/2011/item/item_details/VID_43355396-VCD_69487795-gid_27-sort_4-display_50-item_BES99709260TRK/EXHAUST_-_Tuning_-_Exhaust_System-BES99709260TRK-Titanium_Exhaust_System_with_valves_997_GT3_RS_`Br ombacher`_incl._RSR_style_tips.html

 

Not what the link says. They fit the 3.8 and 4.0. So they are actually made specially for the 3.8, which was first. Not to say they don't work just the same, but they weren't specially made for the 4.0. I think that's why a couple people appear to leery.

 

The ones I ordered are going to be made in Germany in the next days with the 4 L specs etc
I think the only difference is the size of the exhaust ports in the header bases,maybe FVD will clear all this soon ...

 

I would think that FVD would likely be the first to have that product. Post some pics when you get the install and all the stuff

 

Sure can't wait.
I had AWE in the 3.6 and OEM RSR with M&M silencer in the 3.8 (BTW for sale) and now the Ti system for the 4.0.So I have some experience with RS exh systems jajaa
Also I had instaled SW and RSS by pass systems that sound very nice...

 

check your PM

 

Guys, Luis Carlos system will be made for the 4.0L that will be for sure.

For example here is how M&M test fits a Cup R exhaust, this is after the autocad design is completed and the system is flow tested...




Then they will take it a step further and will test fit and test the power.

Here is a system they just finished on a 4.0 L RS for example.




The reason why we have so many systems for the GT3 is that everyone is looking for something different and M&M can quite literally produce anything with / without side mufflers / with or without stock cats and still make power.

Having said that we make sure that every system that is delivered makes power across the rpm band. We have been programming Porsche’s for over 25 years now so the combination of our software with the M&M 4.0 L GT3 RS system will certainly be potent and more importantly it will be exactly what Luis Carlos wants.

Last but not least if you want to see some of the experience that M&M have with exhaust systems on the GT3 click the link below...

FVD Brombacher - Street Exhaust Pedigree, what sets us apart.

 

Excellent post Rhonda!

 

So what are the hard numbers? Car BONE STOCK, car with exhaust only, ECU and exhaust. Please post the HP and TQ number sheets from the Dyno runs that were made to make the system(s) during the R&D process.

Thanks in advance.

-Troy