I know a few people who went from UL to EL headers. Some were the same brand and had the same tube diameters. Not one of them wanted to go back, not even the ones that had been fans of the blub-blub sound. A header is a performance modification. Last time I checked, UL were not any cheaper, or longer-lasting than EL headers. If you're more interested in sound than performance, just keep the stock manifolds.