Headers a must with Supercharger?

[SVT-DADDY]

Almost exactly my experience, except I used Mak cat deletes. I'll add that the car picked up a nice but too and seems to run cooler.

Here’s what I found in relation to volume...

Started out with a MF Comp axle back. Nice.

Added catted headers (100 cell) and 3” custom section to replace the factory stuff to the axle back. Volume was insane, as was the drone.

Added 18” (thereabouts) hotdog per side. Toned it a little but still ridiculous.

Swapped mufflers to MF Street. All good.

Removed cats completely and added blower, no REAL change in volume. Still nice to the ear. Loud but not stupid loud.

Hope that helps.

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[ahl395]

If you keep cat protection on, they may last some time but you'll be losing power, and they will still probably fail sooner or later.

If you go headers or MAK cat deletes, you can go with a tame catback to keep the volume down, gain power, and not have to worry about toasting the cats.

 

[PTM5.0]

I just heard my Whippled '18 with SW catless headers, factory resonator, and active exhaust for the first time. It's still very quiet in quiet mode and sounds rowdy but not obnoxious in track mode. Best of both worlds.

 

[beefcake]

def not needed, but if you have the ability for a hi flow cat, especially the kooks green catted, or if the setup is "offroad", you can get more power, and will give less chance of backing up the system! a clogged cat can cause you to lose an engine

 

[mmacoyote]

I have about 4000 miles on my 18 with vortech 8psi and 59 1/4 passes on the cats so far so good I have done some roll racing from 40-1XX mph multiple times so I tend to beat on the car. In the future I do plan to go long tubes but my exhaust is Loud AF already. I would just send it either way long tubes will be in your future.

 

[Redmcguire]

I'd listen to the engineers who designed the system you are installing. My 18 S550 is warrantied so I only used Ford Performance. Stock gen3 comes with "Try Y" shorty (ish) header which many recommend for some forced induction applications due to backpressure requirements. Stock cats are remarkably high flow and long-lasting. Not many parts pushers or performance shops will tell you that up front. You might gain some WHP with long tube headers, but that's not going to necessarily result in a faster car. The Ford Performance/ Roush Supercharger does not require long tube headers yet put 600-50 ish to the wheels and fairly consistent 10 second (low 11s) car (with needed drive line, suspension mods, and tires). First question I would ask is- what do I want the car for- 1/4 pulls, road course, Sunday back roads, street cred. I might take it to the track for a 1/4 run, or a road track for a few lap times, but mostly I'm on the street and backroads. So, I'm sticking with Ford Performance/ Roush because that's what the engineers targeted their design for. GT stands for grand touring. You can mod it for the track, but it's tough to do both well. Ford Performance (and Roush) hit the sweet spot. In the long run, it will cost you much less in money, time and frustration to decide what you want the car to do and look for the engineers who already built and tested it. Everyone wants to sell parts and some parts are not necessary or even substandard to what you already have. I don't race competitively. If I did, I'd build it from the ground up and not with a new car designed for touring. All I did to my exhaust is a resonator delete and a FP X pipe. I didn't expect big gains, and I'm happy with the set up. Currently running FP Power Pack (CAI, calibration kit, 87mm TB), FP X Pipe, and FP Short throw shifter. Snappy, sounds great, and eats up the back roads. Need to make sure they plug the sound tube at the firewall, or it will drone.... If I supercharge it, I'll use FP/Roush, stock shorties and cats, FP Track suspension, an aluminum drive shaft, GT350 half shafts, and a little wider tire set up. If that doesn't get me there, once I'm off warranty, I'll try the long tubes and a custom tune to see if that does the trick.

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