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

FULL-RACE FORMLINE 2011-2016 3.5L GEN1 ECOBOOST F-150 TURBO

ARTEC - 2JZ-GE V-band Exhaust Manifold – Drift HQ

2017-2022 L5P DURAMAX BILLET EXHAUST MANIFOLDS — KillDevilDiesel

06L145702F Turbo Exhaust Manifold Turbine Housing For Audi A7

Fredric Aasbø - Crazy 3D printed Inconel turbo manifold by

3D Printed Exhaust Manifolds and Turbo Housings

Rapidia's Bump in the Road « Fabbaloo

3D printed intake manifold for testing turbo diesel engine

2JZ-GE T4 bottom mount exhaust manifold – Dodo Racing