[TurboWS6]

Check out www.theload.com

They are primarily a semi truck supplier but they have good deals on large diameter pipe mandrels and there located in GA so shipping is fast and cheap. If you dont want to start a account with them they can create a private auction on ebay for what you need they also have a ebay store. I just bought my 4" mandrels from them and plan to rework my down pipe 4" to a cutout and then a transition to 3" so it will go all the way out the back for the street. Wish I could run 4 all the way out buy I don't have a turbo K member so that's not happening.

Also are you sure its 5.5" inlet my S400 has a 5" and here is a the link to the filter I bought. 19.99 and free shipping you cant beat it, and if you think it will restrict you pull it off on the track and let her eat.

http://www.ebay.com/itm/390452627145...84.m1439.l2649

I also built a boost leak test rig for a 5" inlet so if it is that size you can borrow mine and test the system once its done to save yourself 25 bucks.

Cheapest place to find the Borgwarner v band is at www.racepartsolutions.com