ANONYMIZED PROJECT CASE
A North American automotive aftermarket customer moved a 304 stainless turbo exhaust manifold through DFM review, investment-casting development, material and dimensional checks, installation validation and repeat supply.
PART & APPLICATION
The manifold is used on the exhaust side of a performance turbocharger system for GM LS-platform applications. Integrated passages, flange interfaces, mounting locations and elevated-temperature service requirements had to be reviewed together rather than as isolated casting features.
PROJECT REQUIREMENT
The customer needed a small-batch 304 stainless exhaust manifold with integrated passages, controlled wall transitions, flat and aligned flange interfaces and stable mounting geometry. The project also required material documentation and a practical route for dimensional and surface verification.
Exact quantities, service temperature, controlled dimensions, tolerances and acceptance limits are withheld.
MANUFACTURING CHALLENGE
The manifold combined multiple curved exhaust passages and mounting interfaces in one casting. The route needed to address wax-pattern and shell accessibility, filling and feeding of connected passages, wall consistency, distortion risk and access for finishing and inspection.
The customer was also evaluating durability under its own exhaust-system conditions. Material suitability and performance therefore remained application- and test-specific; the public case does not claim that 304 stainless steel is automatically suitable for every turbocharger temperature or duty cycle.
MANUFACTURING ROUTE
The primary process and supporting operations are shown as one connected route.
The engineering route combined drawing review and DFM feedback with investment casting of the integrated manifold geometry. Review focused on passage continuity, wall transitions, flange and mounting interfaces, wax and shell handling, casting fill and feeding, distortion control and access for finishing.
Blasting provided the specified external surface condition. Material confirmation, dimensional inspection and customer installation testing were completed before repeat supply. Final suitability remained tied to the customer’s released design and application validation.
Part function, controlled dimensions and acceptance needs.
Lost-wax investment casting for complex steel components requiring detailed geometry, repeat production and coordinated machining, finishing and inspection.
The cast manifold received a uniform blasted external finish as part of the approved production route.
Flange faces and mounting interfaces were finished and verified to the controlled drawing requirements.
Evidence checked against the agreed project scope.
TOOLING & SAMPLE APPROVAL
The recorded route progressed through drawing review, DFM feedback, first-sample casting, dimensional and material checks, customer installation testing and application-specific elevated-temperature validation before batch release.
The workbook records a three-to-six-month inquiry-to-order cycle including sample validation. Estimated future lead times are not published as guaranteed delivery commitments.
QUALITY & VERIFICATION
The project plan included dimensional verification of the flange and mounting interfaces, material spectrometry, visual inspection and hardness review where required by the released route. Material documentation and a first-article dimensional report were used during customer validation.
Exact tolerances, test temperatures, cycles and acceptance limits remain confidential. Future parts require drawing- and application-specific review.
The production route included material spectrometry and material documentation for the specified 304 stainless grade.
Outcome: Material identity was included in the sample and batch validation record.
Flange, mounting and interface characteristics were checked against the released drawing during sample validation.
Outcome: The customer proceeded to installation testing after the recorded dimensional review.
The customer evaluated the manifold in its own installation and elevated-temperature duty before repeat ordering.
Outcome: The workbook records acceptance with no cracking or deformation reported during the stated customer validation, followed by repeat supply.
PROJECT RESULT
The workbook records successful batch supply, customer installation validation and continuing repeat orders. No cracking or deformation was reported during the customer’s stated validation scope.
Yield, on-time and repurchase percentages from the worksheet are intentionally not published because no approved supporting records were supplied. The result should be read as one project outcome, not a universal performance guarantee.
CONNECTED CAPABILITIES
RELATED PROJECT RECORDS
ENGINEERING REVIEW
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