So I decided and made the splurge and purchased the Eisenmann exhaust...It only took about 5 months to get here but eventually it did....however after opening the box it say 04 X5 4.8. I know that the diameter of the pipes are different on the 4.4 and the 4.6/4.6, so please tell me that this will fit my 4.4 with no problems ....any info would be great.....Also Will delaer install?

thanks