For me and the others looking for an o2 housing! Vote for the best (Fitment, Quality, Size in inches) Post gains if possible!

 

I got the Tomei Expreme set up. I like it a lot. Fitment was just perfect.

 

i only have experience with the Invidia o2 housing. fitment was great and turbo seemed to spool a lot quicker (as with other o2 housings i assume). i'm just saying it works!

 

ported and coated stocker

 

I got the Helix one from gruppe-s, no problems on fitment, good price!

 

I vote other. Get the cheapest eBay housing you can find and have a local fabricator set it up for a separate WG dump.

I personally have a Megan for now and I had some fitment issues. I basically had to hammer the thing over the studs and ended up repairing threads on nearly every bolt, nut and stud involved.

 

Have the Invidia 02 housing,it's a true 3" 02 housing, the spool is much sooner, a shop installed it for me and it took them 2 hours only to install.

 

Meganand I had to dremel out one bolt hole a little.

 

Ppi

 

The Helix ones were some of the first on the market that actually cleared the a/c. I've had mine on several turbos since '04 This is not saying that all of the others are of lesser quality, just have seen a FEW ebay jobbies that were pitiful attempts at the design. Looks as though about only 1 out of 5 are of questionable quality.