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Here's a couple pics of the modifications that I did to the inlet track on my car. My car is speed density so it made things simpler. I didn't see anymore boost unfortunately. I think my boost numbers are limited by the slip of the belt.
Who makes the new rubber inlet? Even though it is larger, it appears to be restrictive where it has the "wall" in the airflow path.
I will say to those looking for more boost, to put a gauge on the blower discharge and see how much boost is available in your current package. In my case, there was a "lot" of restriction downstream of the blower. What can you do to simplify the path?
There's not anything I can do downstream of the blower to get a more unrestricted path since I'm not running an intercooler.
The cobra head piece is wider, deeper and yet is still somewhat contoured to the flow of the air into the blower. I would definately think that it would flow more volume than the stock vortech one; the vortech one looks puny compared to the cobra head. I also have a homemade anti rotation valve that I toss on there as well.
I don't unfortunately. I bought the parts off ebay. The 4" aluminum tubing I bought at a construction place and ovalized by hand on the part that is vertical from the cobra head to the 90*. This is a pretty easy option if you ever upgrade from s trim to t trim because the cobra head has different inserts to make the mouth different sizes.