Kevin Schitoskey Posted January 31 Share Posted January 31 Facing the dreaded Exh manifold replacement for my 99 ISC 8.3. I had some sticker shock when contacting Cummins - $ 1,074 for the 2 piece manifold. Couple of questions for the group: 1. Does anyone have any experience with aftermarket (read: non-Cummins) manifolds like below? https://www.fridayparts.com/exhaust-manifold-long-3964070-short-3937477-for-cummins-engine-8-3-8-9-8-3c-qsc-isc-isl-qsl-l8-9?msclkid=d9f3fd81b0fd15595c259e59f6d0a446&utm_source=bing&utm_medium=cpc&utm_campaign=PLA-usafreeshipping-US-9.23&utm_term=4586750202629092&utm_content=pla-usafreeshipping-us-9.23 2. The crack is in the smaller of the 2 piece manifold. Am I correct in assuming that these must be replaced as a matched pair? Replacing only the small portion would save a turbo removal, fewer bolts to break off, etc. Thank you all in advance for your input. Link to comment Share on other sites More sharing options...
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