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Review on Hedman 21115 Header Reducer - Set of 2: Boost Performance and Efficiency! by Daniel Steele

Revainrating 5 out of 5

Solid execution. on manifolds and parts

Fully suitable for bench testing with full exhaust engines for moderate noise during testing. Very small gap in the sealing surface at the weld. I sanded it with a square block and a few minutes. The sealing surface is then completely square. I used copper manifold gaskets. No leaks in 10 hours of operation.

Pros
  • Includes all required flanges and gaskets
Cons
  • Protection