PSR Twin Scroll Exhaust Manifold/Headers Subaru WRX 94-14/STI 94-17/Forester 97-13/Liberty 04-09PSR all stainless steel twin scroll Equal Length exhaust manifolds for New Age WRX STI GDB Type C F. Lost wax finished with 3 1 connectors smooth inner surface for better flow. Stable & effective connection by the slip joint bracket and air leakage avoided by the 3 bolts flange design up pipe. All PSR headers are covered by a limited 1 year warranty.