Headers – Single Turbo – 1.625″ 304 SS Bolt on single turbo headers. Turbo mounts in stock location for use with RPM, PTE, and ATR downpipes. For use with OEM, L35, or Vortec Cast Iron Heads. MUST specify cylinder head type when ordering, as the coolant temp sensor ports differ and the flange orientation is changed. Note: Requires Solid Motor Mounts, RPM Steering Shaft, and new lower water pump hose. 1 5/8″ primaries, 2.5″ X-Over Warning: Recommended for fully built engines with 5000 + RPM and larger turbos!