Drive an equal length header around town in your daily driving manner, and one without the EL...... the ndrive around town with the stock.... You'll notice the difference. Off boost response is much improved. Don't just look at WOT.
You should ask Big Al (Dynoflash) why he changed to equal lengths....at least that's what it sounds like during his 704whp pull..... I could be wrong. ....yes I am wrong... he uses twinscroll setup!!! Best of BOTH!!!