Review on Hedman 21115 Header Reducer - Set of 2: Boost Performance and Efficiency! by Daniel Steele
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.
- Includes all required flanges and gaskets
- Protection
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