Prototype 1 manifold Prototype 1 turbo manifold is a must for those seeking to extract more power than your average tubular. offset turbo placement for larger downpipes. Applications: '96-95 Civic '93-97 Del Sol '94-01 Integra '96-00 Civic '90-93 Integra '88-91 Civic/CRX Application Notes: Must use 1/2 sized radiator. Key design features include: The merge collector creates a turblent free area for the exhaust gasses to enter the turbine housing in even pulses at high velocities. TIG welding for ultimate strength and longevity. Flange surfaces machined flat ensuring a perfect seal. . Prototype 1 manifolds allow powersteering to run in conjunction with the manifold