Only concerns...don't waste your money on the custom catback...just buy your Magnaflow Mufflers and whatever tips you want...the Magnaflow HFC has a chance of throwing your check engine light because it flows more than the stocker so the PCM thinks there isn't a converter there. If your car is a pre-'01 then you can just buy an o2 sensor simulator from ZZPerformance or another 3800 vendor and just plug it in and remove the rear o2.
What I would do...is get the HFC welded in, have the U-Bend taken out...get a cheap glasspack style resonator that is 24" or longer from SUMMIT Racing or JEGS for like 30 bucks...keep the factory "Y" as it is good up to 350 WHEEL horsepower...and since your no where near that level you don't have to worry about messing with that...have the mufflers and tips welded on and DONE.
Also...make that intake like I told ya about
