The PHR direct replacement diverter valves will eliminate the notorious "Honking" sound commonly heard when the OEM valves have failed.  These Billet Diverter Valves will replace the OEM parts and balance boost more efficiently and hold a higher peak over stock. In addition, they recover quicker than the OEM valves which allows better spool up after shifts. The PHR Billet Diverter Valves for the 996TT / X50 / GT2 / Turbo S come ready to install and have a lifetime warranty.