there is also word going around that the DC header cracks after only a year or two..... I have not seen this on mine or my friends, but the reason I think some peoples have cracked is because they put heat-wraps on them..... remember, you arent going to get the bang out of the DC header like you would with Mugen, but when you consider the price difference around 300 for DC, and around 1K for Mugen, then there is definitely enough reason to go with DC. Is yours a 4th gen? Because im not sure about the stock header on the 4th gen, but on the 5th gen the stock header almost identical to the DC header, and thats the reason for minimal gains if any......