jacobs4x4

Well I have strait pipe with cats single side exit in front of rear tire... One day I want to have true dual stacks...

V8 Addiction

true dual flowmaster 40 series. love my sound

charger77

Cat Back Borla. Dual out the rear. Still waiting to throw it together..... Will post my thoughts on it later

07 4.6 V8 Screw.

N3UP

My 97 F150 4.6 has a Gibson cat back SISO system on it. 3 inch pipe I think. Exit behind tire. It was on it when I bought it, so I don't know how much difference it made performance wise, but I like the sound. I wish it was a little louder when I get on it, but for long trips it's great. No drone, but a little growl when you get on it to remind you that it's there.

My 91 F250 7.5 has a muffler shop cat back system. 3 inch from the cat to a Vortex SIDO muffler, 2 1/2 pipes out the back with 2 1/2 SS straight tips.
Gained about 1MPG, but noticed no performance difference. Then again it's a 6100lb truck.....
Sounds good on cruise, not really loud. It has a real nice resonance at about 1500 rpm, but it actually gets a little quieter at WOT....kind of wierd.

It's lots of fun in parking garages (the few that I can get into) and tunnels.

mudfish

86 302 melatone SIDO 2.5 inch pipe, it has a nice sound at certain rpms, close to a stock gt mustang with the 302. But at other rpms you can't hear it in the cab at all. Sounds the best when its in a gear and you just do touch the gas, just enough to keep it moving and when you let off to shift.

charger77

Finally updating after I put my Borla on. It looks and sounds amazing. Only a little louder than stock in the cab, no drone. This thing only gets loud when I want it to (accelerating).

jhelrey

Are the dual pipes worth it?

8thgenf150fan

'90 F150 300- Flowmaster 50 series

I didn't notice any differance. But then again I did not expect much from a 300 six exhaust.


'89 Bronco 302- 3 way cat and a straight pipe.

It sounds absolutely awesome. Much better sound than a Flowmaster in my opinion. No droan in the cab either.

Soon I plan to custom bend true duals with a 3 way cat on each pipe. I also plan to put flanges so I can bolt and unbolt the cats and muffler for when I go off roading. I also want 2 inch tubing instead of the 2 1/4 thats on it now.

The Boz

I guess it is time for me to add mine to the list

2009 4.6L Triton V8
Flowmaster 40 SIDO Catback

GymRat

Tomorrow the mods begin.... I will put either a Magna Flow or Flowmaster SIDO on (after I listen to them both). Saturday I tint the front windows, order the CAI and the Tonneau cover. All thats left it the Tuner. I'm leaning towards the SCT or the Hypertech. I'm a little concerned about the SCT and what it cvould possibly do to the trans.

I have an 09 Lariat Crewcab, 5.4L. Razer Red Two Tone 20" wheels, pwr everything. The bed has a ProCote liner.