SOUL Porsche 718 GT4 RS / Spyder RS SOUL Race Exhaust System ADD RESONATOR:YES The rails with the notches

The rails with the notches along the sides are the stationary bottom rails and are 15-1/2" long

With valves open

User-Customizable Start Up Screen

Securing a 718/981/991/991

SOUL Porsche 718 GT4 RS / Spyder RS SOUL Race Exhaust System ADD RESONATOR:YES The rails with the notchesThe factory rear muffler wasnt much of a restriction on the standard 718 GT4, but reusing it for the GT4 RS has created a bottleneck for the GT3 derived engine. The tubing diameter remains the same, meaning that increased power is now forced through tubing that measures less than 2 inches. Repurposing that muffler helps meet sound restrictions and eases manufacturing processes, but doesnt extract the most performance out of the GT4 RS. Our Race