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Message: [QUOTE="jeremiahmercier, post: 1169065, member: 5601"] Yes, would be nice to know, I'm thinking of doing frame off restoration and switching to 4r100, will do a full custom interior and probably modify cab for a larger down pipe... Next question, is there really even enough benefit from going to a 4"? Seems like I remember a thread where innovative (don't quote me on who or what company, I could be completely wrong) said they actually saw improvement on lower egts with a 3.5inch dp as aposed to a 4inch, I believe they contributed it to a scavenging affect??? Again, I could be way off on what I remember [/QUOTE]

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