Port Tube 2-7/8" ID x 5" L

I got a pair of these and made what might be a rookie mistake - sizing the hole for them by matching it to the lower end (inside end) of the port. I realized after I'd cut the holes that there is some taper to the tube (draft to get it out of the mold, I suspect) and for this tube, it's rather pronounced. So - be sure to measure up near the mounting flange to size your cutout for these tubes.

I like the ridges that are at the end, they asure a snug fit. The oem type usually are designed the same way. I think it could look better if it was totally flat on top,but doesn't affect performance.