Racing Dynamics Race Headers Porsche 911 GT3 / GTR RS / R 991 (2013-2019)

These Race headers from Racing Dynamics fit the Porsche 911 GT3, GT3 RS, R 991 2013-19.Features:- All TIG welded 304 stainless steel- Smooth mandrel bends for best air flow- Fairly large output gains of approximately 30-35 HP and 35-40 ft.lb. torque with tune- Straight forward installationFITMENT:Porsche 911 GT3 991 3.8 liter 2013-16Porsche 911 GT3 RS 991 4.0 liter 2015-16Porsche 911 R 991 4.0 liter 2016These parts are intended for off road or track use only! This product is sold for off road use only. It is not legal for use on public highways. This product is not for sale or use in California. You probably may have a check engine light during the use of this product.