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Dundon Motorsports 991 GT3/RS Street (Catted) Headers Group Buy-GT3: 30whp RS: 32whp
Hello all,
We are happy to announce the initial group buy for the Dundon Motorsports GT3/RS Street (Catted) Header with 200CPSI metal core cats, and valved side delete pipes. We've worked hard at keeping the costs down even though we're adding more to the system.
Retail Price: $7950.00
Intro Group Buy: $6950 for up to 20 systems
$1000 deposit to secure your spot.
We have tested these extensively and exhaustively. 7+ variants and our first version was the best.
The Dundon Street Headers on 991 GT3 make
434whp peak
30whp at 8215rpm
26lbft, 23whp gains at 4586rpm
The Dundon Street Headers on 991 GT3RS make
445whp Peak
32whp at 8400rpm
29lbft, 24whp gains at 4478rpm
The 991 GT3 and RS with the catted system shows it's emissions based camshaft tuning for about 5100-6000rpm area. This stock tuning flattens the power delivery for about 400rpms and then climbs quickly starting at 5400rpm. This is completely fixable with a tune, but understand that many will not want a tune.
You get everything you love about the Dundon Race Headers, 321 SS construction, industry leading power, lifetime structural warranty, and 100% money back guarantee, if you try it and don't like it, send it back we'll give you your money back!
To that end, see the dyno below!
We're getting videos and such together for all of you!
991 GT3 Dundon Street (Catted) 434whp peak 991 GT3 Dundon Street (Catted) System vs Stock
991 GT3 Dundon Street (Catted) 26lbft and 23whp at 4500rpm 991 GT3 Dundon Street (Catted) vs Stock, 26wtq and 23whp at 4500 RPM
991 GT3 Dundon Street (Catted) 30whp max gains 991 GT3 Dundon Street (Catted) 30whp max gains at 8215RPM
991 GT3RS Dundon Street (Catted) 445whp peak 991 GT3RS Dundon Street (Catted) 445whp
991 GT3RS Dundon Street (Catted) 29lbft and 24whp at 4478rpm 991 GT3RS Dundon Street (Catted) 29lbft and 24whp
991 GT3RS Dundon Street (Catted) 32whp max gains 991 GT3RS Street (Catted) 32whp max gains
Some pics installed on the car, the street headers are only about 1" shorter than our race headers. To fit everything we had to go up into the wheel well where the side mufflers sit. Only way to get the length required for real power gains...
Dundon 991 GT3/RS Street
Dundon 991 GT3/RS showing length of primaries and routing required to fit the cat
Dundon 991 GT3/RS showing length of primaries and routing required to fit the cat2
As you can see to get the length we wanted we had to go up, anything that can bolt up to the stock location is leaving power on the table...
Video from the dyno so you can see and hear the awesomeness! You also get a good shot of how the headers are routed with the wheel off!
We have to gauge current interest ad manage cash flow. To that end we're looking at about 6 weeks or so for the first sets to get produced. We will wait about 1-2 weeks for the GB to proceed and then start ordering the extra materials we need based on demand.
09-25-2016, 10:09 PM
Dundon Motorsports 991 GT3/RS Street (Catted) Headers Group Buy-GT3: 30whp RS: 32whp
I think Mooty has rubbed off on me. 
