Stainless Steel Exhaust Manifold for GM 454

Factory stainless steel exhaust manifold for GM 454 engine as used in trucks and recreational vehicles.

Factory stainless steel exhaust manifold for GM 454 engine as used in trucks and recreational vehicles.


Factory stainless steel exhaust manifold for GM 454 engine as used in trucks and recreational vehicles.

Factory stainless steel exhaust manifold for GM 454 engine as used in trucks and recreational vehicles.

GM created these rather expensive to make welded stainless steel exhaust manifolds after encountering a severe problem with their cast iron manifolds warping when the engine is used to deliver large amounts of power as it does in a motorhome. Ultimately GM selected a different grade or alloy of cast iron that they deemed good enough to do the job and went back to the less expensive to make cast manifolds.

About Art

55 years old. By training, ability and experience I am a master toolmaker. My most recent projects include designing and building a process to grind a G rotor pump shaft with four diameters and holding all four diameters within plus or minus 4 microns of nominal. This was an automated process using two centerless grinders refitted to my specifications using automatic load and unload machines plus automatic feedback gauging. I also designed and built an inspection machine to check for the presence and size of a straight knurl on a hinge pin using a vision system for non-contact gauging.
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2 Responses to Stainless Steel Exhaust Manifold for GM 454

  1. scott joyce says:

    do you have anymore info on what years or models had these? I’d love to have a set! Thanks!

    • Art says:

      I’m not that Savvy on GM engines, more of a Chrysler guy myself but I have to work on what I own and Chrysler powered motorhomes are rare. That being said I imagine that these manifolds fit a goodly number of years for the GM 454.

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