It gets old at highway speeds in my 2.5L TJ. 3000+ RPMs constantly means it resonates pretty much all the time. There's some vids I think in my photobucket account by this screen name.
1998 TJ Wrangler SE - Stone White, 2.5Ls of screaming lifter clacking power, AX5, 31" BFGoodrich All Terrain T/A KOs
2010 Wrangler Unlimited Sahara - Deep Water Blue, 3.8Ls of oil consuming fury, NSG-370, BFGoodrich Rugged Terrain T/A 265/70/R18s