My recommendation is to try the cheap stuff first. I would vote the collector is making the noise. Check the collector bolts on the header because they can loosen if not torqued tight enough when the Hpipe was reinstalled. Then do the hose and listening trick which works great. Then go from there!
Just my .02-
Rob
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89 LX 5.0 Notchback,
FINALLY NO LONGER STOCK!
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