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Price: $3874.00
Offered as a complete set including the headers to the "tips": for Porsche GT3/GT3RS 2017 to 2019; includes GT3/GT3RS Sport Headers: with HJS 200-cell catalytic converters (no check engine light) all constructed from T-304 stainless steel. Fabspeed documents approximately plus 15 hp and plus 10 foot-pounds of torque; "these catalytic converters flow up to 93-95% of a straight pipe in most applications. Offered by Fabspeed at $4,725 plus shipping and taxes. The combination of these components reduces ~50lbs. of weight from the rear of your Porsche GT3/GT3RS.
The other part of the "set" is the GT3/GT3RS Catback competition race X-pipe with brushed stainless steel tips. Note that this setup "removes" the two O.E.M. side mufflers and the center muffler. Installed in my 2019 GT3RS, I did not experience any "drone" or check engine lights. Offered by Fabspeed at $1895.95 plus shipping and plus taxes.
AGAIN, the combination of these Fabspeed exhaust components will reduce weight approximately 50lbs from the rear of your Porsche. Volume level inside the vehicle will be higher. All of this is simple bolt-on for your 2017-2019 Porsche. At the track, the sound (to the bystander) is way better than the standard Porsche GT3/GT3RS exhaust system which sounds constricted(which it is).
Shipping cost determined by continental U.S. destination and would be approximately $297. I live halfway between Los Angeles and the San Francisco Bay Area and a "halfway" meetup could be arranged in lieu of shipping.