3D Printed Exhaust Manifolds and Turbo Housings

I saw some videos of some racecar guys 3D printing exhaust manifolds out of inconel. That got me wondering if there has been interest in 3D printing exhaust parts out of these super alloys for the marine market. It seems to me that

Hypertune - #HypEX 347-ss v-band high-mount turbo manifold

3D Printing Metal - Processes

3D printed turbo manifold for Papadakis Racing team

Design and Analysis of An Integrated Exhaust Manifold with

Chevy LS3 Engine Twin Turbo Set-Up by Spragmatic

Turbo and exhaust manifold - High Temp Bronze

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Our 3D-printed Inconel 625 exhaust - HPA Motorsports Inc

AMAZING 3D Printed Automotive Exhaust Manifold!

Custom N53 SS turbo manifold fused to 3D printed SS turbine