Posted August 6, 200321 yr comment_46374 part # 5501, 2.25" in/2.25" out, 50 state street legal. It's pretty free flowing, you can see light from the other end of the muffler if you look through it. Specifications: * Series: RPM * Overall length: 19 in. * Case length: 15 in. * Thickness: 3 5/8 in. * Width: 7 1/8 in. * Inlet diameter: 2 1/4 in. center * Outlet diameter: 2 1/4 in. center Muffler was barely used on a Z for about 30 minutes for testing, and removed. It's virtually brand new, in box with all packaging. $60 shipped. please email aux@highrpm.org Link to comment https://www.classiczcars.com/forums/topic/7389-fs-edelbrock-rpm-series-muffler/ Share on other sites More sharing options...
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