First let me say what a help this site is. I just bought a 06'
SCAB (5.5 shortbed) with the 4.6 v8. I want to upgrade the exhaust as to get better performance whithput going deaf. I plan on pulling a motorcycle or utility trailer once in a while and don't want to lose torque. Also should I go to a cold air box also? Lastly having worked on Harleys for a while if you make a change like this you have to download a new map for the E.F.I,doe's this hold true here or doe's it set itself? Any help is appreiciated.

 

The Magnaflow catback systems are not too loud and you actually pickup some torque and HP down low...

As far as intakes and tuners, I recommend the AF1 high performance intake and the X Cal 2 tuner with custom tunes from Troyer Performance...

The AF1, X Cal 2, and Magnaflow are a good combination...

 

You don't HAVE to do anything to the computer for just exhaust. If you add a CAI I would suggest disconnecting the battery, draining the computer, so it will relearn with the new intake.

I also have a Magnaflow on my truck. It sounds awesome. Not to loud cruising around or on the highway, but it gets loud when you gas it. Check my pics.

 

I have the flowmaster originals 40 series and I think they sound awsome. not too much of a drone, just a little around 2K rpm.

 

How long do you have to leave the battery disconnected?
Also doe's the CAI make that much more HP?

 

Unhook the battery and turn on the headlights to drain out any current, 15 mins. should do fine. The CAI might add another 10hp. It's another one of those things that helps the truck breathe a little better.

 

Magnaflow does not make a cat back for a short bed SCAB. If you were to buy one and shorten the inlet pipe you void the warranty.

Flowmaster allows you to cut down the pipe but flowmasters are know torque killers.

Take a look at the Banks Monster Exhaust. They make a specific cat back kit for the short bed SCAB. It is a nice flow-through stainless system.

 

How often do people really need to use the warranty on a muffler? Just cut the pipe down and don't think twice. I put Flows on my last truck AND cut 2 of 4 cats off, talk about low-end torque loss!! Banks makes some killer stuff, it's good and they know what they are doing but it's expensive. The cheapest I ever found the Monster kit for was about $475 online a few months back. I have a total of $300 in my Maggie exhaust.

 

what about the roush exhaust systems?

 

Borla makes a couple of kits for the 5.5 SCab. I went with the SI/SO and have no complaints. Sound quality is good but it is not loud at all.

 

went with flowmaster catbacks great tone crackle a little with u let off after flooring it ahhhhh sound great the 3 chamber a bit to low for me i want to be heard a mile away though so im hunting a new muffler one chamber be better for me any one?????

 

The one chamber should be pretty loud. It's pretty much a street legal race muffler for those that require emissions testing and must have a muffler.

 

thanks

 

Thank you all for your input! I am still undecided,anymore help would be apprieciated. I am leaning towards the magnaflow but am doing some research on the Banks.

Thanx,Ned
P.S BUBBA is back! Sirius channel 101

 

Chalk up another on the Magnaflow system. I went with a full stainless steel system on my '06 FX4. Check out my gallery for pics. I've been very happy with my Magnaflow system. Nice rumble to it. No drone at all. Really opens up when/if you stomp on it.