Originally Posted by C ///M
Could someone explain or try to explain the areas where the x-drive vs non downpipes differ? My application is a bit on the unique side. My N54 is going to sit in an E83 X3 chassis, so I have more space than a standard 3 series. That being said, being an x-drive car, is the space constraint on the transmission and front transfer case side? Sorry for the stupid question.
I've tried looking at pictures, but its hard to tell, haven't seen a good X-drive downpipes installed photo. I feel like the standard downpipes are less restrictive even though both have to neck-down to 2.5", the x-drive variant just having to do it sooner...
You should have a good shop fab a set of dp's that will fit perfectly. If you get dp's for eithier a 335i or 335xi, you will still need to do some fabbing anyway...