That is my actual exhaust system :




That are the changes i will do, but my question is, do i install an X pipe or i just leave like that ? What do you guys think ? Thanks.

 

This system here is from JLP but i don't know why he didn't use an X pipe. On my system the catback will be replaced by 2 straight pipes.

 

Some mufflers have an internal "x-pipe" so an additional crossover is not needed. I've never noticed enough of a difference other than sound between h-pipes, y-pipes, or x-pipes other than sound to justify re-engineering an exhaust system over it. For most it comes down to sound preference or installation issues.

 

http://www.magnaflow.com/02product/s...ne=main&id=415

 

YOu want somthing like this?


From what I hear, its one of the best ways to run an exhaust.

 

Thanks for the pictures KHENDRIX. I will post pictures of my set up and what i have in mind.

 

One picture worth more than 1000 words,

That's my current exhaust set up installed:



That's the project i have in mind, but here is the question:
Install X pipe or not ???

 

If you are not going to use a muffler I say definitely use an x-pipe. Without it, IMHO, it will sound like crap. The x-pipe helps even out the pulses and makes for a smoother, nice V8 rumble.

 

LowFast, as you said the X pipe seems to be an advantage with or without the mufflers right ? Take a look on the nice set up posted by Khendrix, it has an X pipe and mufflers too.

 

woah hold one second here.

straight pipes are loud and the pulses are more pronounced we'll call it a 6 on the loud scale.

stock mufflers are a 1 one the loud scale.

'h' pipes reduce the sound by around 6 dB over open pipe alone. the pulses crash each other and reduce sound.
'h' pipes increase the effective collector size thereby improving torque. open 'h' pipe is a 4 on the loud scale. i have run them open for years without being pulled over.

now and 'x' pipe is a different animal. it does the same thing as an 'h' pipe... it increases collector area and improves torque. now what is different is the pulse waves.

the pulses sonic waves travel out of the exhaust AND back to the headers. an "X" pipe is way louder than any other sound. even with stock mufflers an x pipe without cats in full throttle running is a 3.5. as loud as open 'h' pipes. if you remove the mufflers from an "X" it is unbearably loud. hear it for blocks. people have commented on my old exhaust('x', stock mufflers) as sounding like a race car from inside their car.


'x' pipes and "H" pipes do the same thing for torque, but the "X" does it more efficiently. add 5 or so lb-ft for a 4.6 2v over "H". our cars come factory with "H" pipes and we all trash them and get true "X".


rafael you have to have 1 3/4 or larger headers to make the kind of power you want. 1 5/8 is marginal for N/A 5.4. i am going to fab 1 7/8" x 37" headers for mine. i cannot reach 500hp wothout them.

 

I know 1 5/8 it's not ideal but not having any muffler and using straight pipes instead will reduce the back pressure a lot leaving room to build up HP.

 

the picture that khendrix2374 posted is of my exhaust. I have the pace setter long tube 1 3/4 primarys with a 3" collector, 3" high flow magnaflow cats, 2.5" magnaflow x-pipe and 2.5" magnaflow 11" DI/DO. Now this combo netted me 255 rwhp and 290 rwtq with just a K&N drop in. At idle it is very mellow and at cruise it is nice but it will wake up nicely under WOT and sounds dang near close to a NASCAR race car. Here is a sound clip of mine at idle http://media.putfile.com/trual-duals I do have a sound clip of it driving down the road but cant find the link at this time.

I would definetly go with a x-pipe or h-pipe if you are not going to run a muffler. Magnaflow does offer a muffler with a built in x-pipe DI/DO.

 

I've been playing with exhaust because I haven't been happy with the tone since day one. I have Dynatech's system then hacked it up and went with true duals back to 2 seperate flowmaster 40 mufflers and no "x" pipe. Sounded like crap. Swapped out the 40's for 70's and still sounded like crap but quiter. Replaced the 70's with a single DI/DO l muffler... sounds bad. I have decided, since my cats rattled themselves out to go from the headers back and reconstruct my exhaust. Magnaflow cats into a X pipe into 2 seperate Maggie's (L spec) and exit them infront the rear passenger tire. Hopefully I'll be happy this time.

 

Brahmus the real deal here is to know if my set up will be able to work with 600RWHP + , concerned about back pressure and not sound.
Take a look on the pictures, the first one is what i have installed on the truck now, won't be able to handle 600RWHP+. I think the way i wanna customize it, without mufflers and using straight pipes will be ok for 600RWHP+.



This is the custom work i want, no mufflers at all. Do i use an X pipe or not for that kind of power ? What would be the benefits of adding an X pipe to this ?

 

You don't have to be as concerned with freeflow unless you are trying to squeeze 1hp or so out of the system. There are a few Lightnings running over 500rwhp with stock exhaust and some even more with 2 of the 4 cats removed. I think straight pipes with no mufflers or X pipe is going to get annoying real quick. You wouldn't give up much if any hp.