Unless your using an AEM EMS, yes you will get a CEL and will fail emissions legally anyway

 

you are correct, but like you said numbers don't lie. Your numbers are lower b/c you are 4 feet away! i have no idea how loud your car is since i've never heard the inline pro exhaust in person, but in most threads that i have read, ppl agree that 3" in general is pretty loud. But loudness is subjective, so i guess the OP will just have to wait until he gets an exhaust to understand his tolerance for loud.

 

Ok so I decided on two Magnaflow Polished Mufflers with the stock 04 tips, 3inches back to some kind of 3inch test pipe, if when all is said and done if it is still too loud, would I be able to throw on a 3rd muffler lets say in between the Test Pipe and where it splits? It would be 3 inch straight through muffler so I think ti wouldn't restrict flow too much what do you guys think? I am pretty comfortable though that with a Turbo and two Magnaflow Mufflers (not the smallest, not the biggest, right in between size) it really shouldn't be too loud...........

 

yeah with two medium sized mufflers, it should be bearable. And yes you could always throw in an extra pre-muffler right before the split (where the stock one is).

 

The majority of SS flex pipes are braided SS over a mild steel bellows. There is only one 100% SS flex pipe made by Stainless Works. Available at Jegs for about $75.00 for the 3" diameter. Don't get ripped off paying high price for inferior product. If your exhaust is SS then weld SS to SS, not SS to mild steel.