991.1/991.2 GT3, GT3RS, 911R

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Testimonials

Would like to make a review of the products as well as the customer service of Jamie in particular. Summary - High quality products paired with superb customer service - highly recommended! Just a brief background on the car: 2007 997.1 GT3RS Car has about 35000 miles and I intend to keep it for a long time to come. Decided to install the... read more

HerShann - Singapore
997 GT3 Carbon Airbox, Harmonic Damper

991.1 and 991.2 GT3, GT3RS, 911R Race Headers with Flapped Side Delete

Constructed from 321SS tuned length stepped headers and flapped side connector, the exhaust combination offers a 40whp increase for GT3 owners and 25whp for GT3RS owners with no ecu flash required and no drone.

$6,950.00

Click on a photo to enlarge.

Race Headers are for Non US or for racing vehicles.

 

Constructed from 321SS tuned length stepped headers and flapped side connector, the exhaust combination offers a 40whp increase for 991.1 GT3 owners and 25whp for 991.1 GT3RS owners with no ecu flash required. By understanding exhaust flow and resonance tuning, Dundon Motorsports developed this combination.  The use of the the OEM center muffler and flaps allow for drone free, quiet cruising and a glorious porsche roar when on the throttle!  This setup is bolt on and can be selected with or without the exhaust flaps.  

Weight of the system is lighter than stock by far. Stock is 86 lbs, the weight of the Race Headers and stock GT3 muffler flaps is 36lbs This is complete header flanges to the exhaust tips including ALL hardware, clamps, straps etc, a savings of 50lbs!

 

991 GT3 Before and After Dyno

991 GT3 RS, 911R Before and After Dyno


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