So i've been throwing around some ideas for an STX legal pipe and here's what I've come up with, tell me why it won't work please.
Option 1. Buy a 3" Catless Down-pipe, and 2 hi-flow cats from JEGS or the like, take it to metal shop at work, have them weld it in.
Option 2. Buy the Helix Down-pipe(or something similar), which appears to have CEL issues, and then buy a single hi-flow cat from JEGS or the like, take it to metal shop at work, have them weld it in.
I mean, currently the only proven option is $900. I could pick up a Helix catted for $329, a cat for $90-170, and pay $50 or two cases of beer to have it welded in for me. Looks like i stand to save massive cash.
Cats I was looking at:
It just seems to me that if our cars sound like they are inconsistant in passing, in my world, that means that you have a tolerance stackup or are very close to the edge of functionality, so adding a cat like I listed should get me to be in the clear.
Plus, based on the DP that bigsky posted, and the pony-keg size cat he's got, i'm pretty sure i don't have to worry about how big of a cat i need to install.
Edit: The other part to this, if needed, is i'm thinking of using a hole saw, cutting out the 02 bung, then making the same hole somewhere else, and moving the bung to the opening i just created.