Our Porsche 991 GT3RS Project has sort of been sitting dormant for a few years. This is due to a couple of reasons, one the car is almost perfect in stock form, so our motivation for doing stuff has been really low, two we are waiting for some secret new shocks that are 3-way adjustable yet keep compatibility with the OEM Air lift and the PASM system. Believe it or not, that is coming soon, and we will have more cool upgrades with Dundon Motorsports and others coming.
Our first new part is the Dundon Motosports Titanium muffler, which is an upgrade from our previous Dundon 321 stainless muffler. The Titanium muffler saves another 16 pounds off the car for a total weight loss of 46 lbs from stock when you consider all the Dundon exhaust parts.
The muffler has built-in 3″ titanium tips, unlike the old mufflers’ bolt-on parts.
The muffler retains the factory quiet flow path on the right and the sport flow path on the left. Like the stock muffler, this should be called loud and louder. From the factory, the GT3RS is pretty loud to the point of us being amazed that it is somehow legal. I think it isn’t. The Dundon exhaust fits their headers and cats and is also compatible with the factory exhaust. The Dundon Ti exhaust makes the same power as the 321 exhaust but is much lighter, and Dundon says it sounds better if that is possible!
The tips feature radiused inlets for better flow. The smooth Tig welds are all hand done by Charles Dundon himself. One thing we noticed is that since the material is super thin, welding causes some distortion of the flat areas of the exhaust that lends the part to have a handmade aesthetic.
10 comments
I honestly wonder about the benefits of a carbon roof in the CA sunshine. It can get so hot that the epoxy returns to the plastic phase and you get delamination. Fortunately, it’s not a structural part so you don’t have to worry about catastrophic failure, but it’s definitely not something I would ever want to pay a premium for.
It looks cool.
Great technical explanation.
You could have mentioned something about moment of inertia and the distance from the CoG location, but you went with the dumbest excuse available.
Within the Porsche world, “it looks cool” is the correct answer. The vast majority Porsche of buyers give a rats ass about any weight savings of the roof which is only about 4 pounds; they get the CF roof because it looks cool. Did you know you can buy an optional carbon fiber owners manual wallet for $810? The door sill guards in carbon fiber and illuminated are a $1250 option. It’s a different mindset.
Khiem, on the RS it’s only one pound difference. This is because the RS comes with a magnesium roof.
Can you really get a carbon owners manual wallet? The stock thin vinyl one is probably lighter. Heck on the RS they took off the cool Porsche emblem and replaced it with the lightweight sticker and charged more!
Because for a one-pound difference, as stated in the story, the main reason is looks cool. I think the trick RS magnesium roof is probably better for a street car.
If you want mental gymnastics for a one-pound difference, you are a weird cat.
Finna be PorscheIQ pretty soon. Love it.
Man, your car is getting light. It’s only about 90lbs more than my 718 T was stock. I’ve taken a little bit of weight out of it, but also added in some weight. I have a couple more things to do to take out weight without compromising the daily liveability.
I have some carbon Weissach edition sway bars that should shave another 12 lbs off. I think my planned strut tower reinforcement and brace might cancel some of that out though. Future carbon airbox will probably shave a few more lbs out of the back.