I just got new '05 F150 5.4 with FX4 pgk and was wondering if there are any cat back systems with dual tips that willl sound good. I put a flowmaster sido on my f350 and it sounded lame.Something about Fords many cats on the oem exhaust. Anyone know of any kick *** sounding straight dual cat back systems out there for this truck?

 

I have seen most popular is Magnaflow for 5.4L ( and 4.6L) 2004/05 F150..

I m planning to order one soon for my FX4 Screw w/ dual out...

Check out troyerperformance.com they have a good price if you call 'em. They included free shipping..

HTH!
YOMAN!

 

have to say go with the true duals. Ive got 3 1/2 inch to 4 inch tips with Magnaflow mufflers and it sounds oustanding

 

I have a Banks kit on mine, and love it. Not dual tips but the tip is an impressive 5".

http://www.f150online.com/galleries/....cfm?gnum=5187

 

They don't have a magnaflow system for the 05's......I would take it to a mom and pops shop....and get true duals....use 2.5" piping into and out of the magnaflow mufflers into a 3.5....15 dgree SS magnaflow tips. Thats what I got, and it rocks!!! It should run you 4 to 5 bills.

 

Magnaflow doesn't have a cat-back for the 05's? Whats the difference between the 04 and 05 exhaust?

 

The intermediate pipe has a bend in it that the '04s don't have....I'm waiting for the '05 system to be released also, I guess Magnaflow is supposed to be releasing it this month sometime....hopefully.

 

I just installed the Magnaflow kit on my 05. Had to do some modification to it.

Intermediate pipe and how the tail pipe hangers were.

Still only a couple hour job. Of course I do have a repair garage with lifts, welder, etc.

Looks good and sounds good. No rattles either.

 

2 words-- STRAIGHT PIPES!!

cheap, loud, and great sound. You can always weld in mufflers later....

 

Anyone ever heard of Mellowtone mufflers?????????
A local exhaust guy told me they sound better than anything else on the 04 & 05. I have no idea what they sound like though???????????

 

I just got me a 2005 F-150 STX with teh 4.6 V8. I want to add dual exhaust and a lot of people tell me just go straight pipes, however I read within a thread that you lose torque with straight pipes. I had a 2002 F-150 Sport with 4.2 V6 prior that I had added dual Flowmaster exhaust and I have to admit it sounded kind of like a rice burner. Really what I what I want to know is for sound and performance whats the best way to go with my truck? I want it to sound like a beast!

 

I am not sure that I agree with all of the info posted in the numerous posts to this thread specifically the parts about modern engines not having any overlap. That is not true per say, and it may have been clarified in a later post I don't recall, but there is overlap, it is minimal but there is some. I am not an engine expert, and I am not a forced induction expert but I have built several engines (mainly SBC) with excellent results. The latest is a 406 that dynoed at 490 HP and 520 Ft/lb of torque, using conservative heads (180cc AFR). The whole key to performance in any internal combustion engines revolves around airflow in and airflow out. Does your goal for the engine involve a max racing effort where idle quality and part throttle can be sacrificed for max HP that is made at a high engine RPM (AKA NASCAR cup engine) or do you want improved performance at reasonable engine RPMs and maintain the civility of your engine. It is certainly not practical to say that no performance gains can be realized by freeing up intake and exhaust flow. Take for example the Lt1 powered late model camaro. These cars started out life as regular production Z-28 with 285hp and after intake and exhaust modifications by SLP they were 315 hp with no internal engine modifications. I agree that forced induction sytems combined with today's tunable EFI sytems (Big Stuff III, Accel/DFI, Motec and others) offers huge power from relatively small cubes and can be made downright streetable. However these systems are extremely expensive. It is probably true that they offer more HP per dollar that simple air intake or exhaust changes but I think that the majority of people on this board are not able to dump 5,000 to 8,000 in a forced induction system. Freeing up intake flow by using an aftermarket intake tract (FIPK and others) or reducing backpressure by installing a free flow muffler/cat back system (FM, Magnaflo, spintec, etc) can improve you HP (it wont be 50hp but at certain engine RPMs gains are made) often time these modifications will provide excess flow so that some other part (throttle body, exhaust manifolds) are now the restrictive element in the system. This is the world of hot-rodding....that doesn't mean that you have to replace these other components it is just that in order to increase HP and torque more they would be the next step. So it really becomes a matter of what you replace when and how far you want to go. Some of the comments about exhaust systems were a little disturbing too, especially the part about stock exhaust mufflers providing a certain length necessary to provide correct flow. Backpressure is never good, with that being said it is possible to over scavage the cylinders but highly unlikely given the mostly static variables (cam, heads, rocker ratio, etc) in most of the trucks on this board. Planning an exhaust system to achieve the max Hp and torque for a given engine combination involves tons of variables, involves a boatload of dyno time, and a detailed understanding of pressure wave dynamics. However some generalizations can be made, such as decreasing flow restrictions, (stock mufflers, and unecessary bends and crimps) improve exhaust flow and Hp and torque. On these trucks modifications to components ahead of the cats or the cats them selves is not legal and so pretty much off limits unless you want the smog police after you, these types of mods often **** off the computer and can be pretty irritating in the long run, so I would really just stick with cat back systems. In most cases you will not be able to get your exhaust pipes too big to really significantly hurt flow in a cat back system, the engine may already view some other part of system further up as "open to atmosphere" due to pressure wave tuning and so you are essentially just removing any restrictions and putting a muffler in to get the desired sound. There is a rule of thumb out there that for dual systems about 2.5 inch is all you need and for single systems 3 inch. After that you are basically just increasing noise and cost, there are no real flow benefits. There are exceptions to every rule but the only way to know for sure what is "best" for your particular setup is to tune with a dyno. I don't mean to flame anyone but I don't want anyone thinking that mods they may enjoy doing that are relatively easy to do and do a lot to contribute to the hot-rod experience of turning wrenches, personalizing their vehicles, and good old fashioned bench racing are not worth it performance wise.

 

oops wrong thread...my bad

 

what kind of bilstein shocks did you put on your truck

 

Dynomax Bullet

Cheap, sounds good, and you only need to buy the one and weld it in place of your muffler, add a nice SS tip and be done with it,

Curtis