Fabspeed Porsche 718 GT4 / GTS / Spyder RENNKRAFT® Modular Street and Racing Headers with HJS Catalytic Converters (2020+) C8 Z06 HELICAL exhaust valves are the

HELICAL exhaust valves are the 1 and ONLY exhaust valve that any GT4RS or BUYER should allow to be used on their exhaust

CAD designed and CAD flow developed

100% Complete BOLT-ON conversion - includes 4

Competition)

Competitor R Manifold Gasket Joint

Fabspeed Porsche 718 GT4 / GTS / Spyder RENNKRAFT® Modular Street and Racing Headers with HJS Catalytic Converters (2020+) C8 Z06 HELICAL exhaust valves are theFabspeed Porsche 718 GT4 GTS Spyder RENNKRAFT Modular Street and Racing Headers with HJS Catalytic Converters (2020+) headers are the perfect solution for any street driven 4. 0 liter Cayman or Boxster. Our patented modular design features a quick release V band connector that allows the owner to easily swap between our German made HJS 200 cell cats and a cat bypass straight pipes for track use (patent pending). Rennkraft , translated from German is