No sir on FFR mufflers. Probably should have used them. My SBC conversion was purchased initially in 2009. The motor mounts were designed for a Ford motor. A good deal of the setup was fabricated. The original kit owner put together a really cool set of roomies with HD MC mufflers in the tubes. Zoomies would not clear my driveway so needed an exhaust. Had a custom shop fabricate the entire system including modifying the header collectors. The whole system has T flange connectors.

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