You may not have noticed, but there is an o-ring in there. No tape is required. Like most of us, your o-ring is probably a rasin after 15 years.
1987 GN 14" K&N, Accel yellow tops, adj. wastegate, adj. FPR, XP Armstrong hotwired, 160*-stat, Hooker 2.5" catback exaust, Thrasher chips, shift kit, trans cooler, vdo boost/oil/temp guages, scanmaster v2.1, T-Link, Kirban's front/rear frame braces, Hotchkis lower control arms, variable rate rear springs, GNX wanna-be rims, and the rest is stock as far as I can tell...or too meaningless to list.
1987 Cavalier Z24 daily driver. 3-chamber flowmaster and 135db worth of stereo.