I have an 89 F250 with a stock 460 and a true dual setup (2.25" pipes) with two mufflers that look like this:


This sounded really nice until one muffler cracked, but I'm mostly worried about having the two pipes mismatched in terms of backpressure and somehow messing up my motor.

To fix it, I though about putting in two red hots that I found at summit racing in the place of the mufflers I have now until I read about X pipes.

So my question is this: Should I go with two glasspacks and an x pipe somewhere in there, and where? Or would a y pipe into a single (larger) glasspack and back out into another y pipe do pretty much the same as an x pipe?

Which one would be cheaper and which would sound better?

 

I would just replace the mufflers and leave it. If you want an X pipe you might as well have the whole system replaced, and at that point a true dual 2.5" system or a single 3" into dual 2.5" would be the better pipe sizes.

 

Ok. If an X pipe isn't worth it at this point, would you still recommend against two Y pipes into a single glasspack?

 

If you can get a shop to build a Y pipe to go into a single glasspack cheap enough then you could do that yes but you would be just as well getting a Dual in Dual out muffler from magnaflow or somthing, actually I seem to recall that a few of thier mufflers come with X pipes built in, being straight through like a glasspack but without the problems of them burning out would make it alot better in the long run too.

 

i agree, do dual in dual out muffler

 

Thanks for the input guys, I'll probably go with two muffs. Now, I've heard of glasspacks burning out and that some people do it on purpose. Are they too loud then? Because unless it's illegal I probably won't be replacing them.

 

You should like the sound you get from them.

 

where do you live, do they have strict noise ordinances?

 

also to go with the noise ordinances, the bonus to a 460 is that with the stock manifolds it will be fairly quiet even with glasspacks vs. Dodge or Chev. so unless your really and I mean really revving it, I'm guessing the cops won't care. If I remember right most mufflers have to meet a noise limit to be D.O.T approved, around 96 Db I think. Don't bother replacing the glasspacks till they fall off. Most don't burn or blow out anyway, and the water trick doesn't seem to work either.

 

Well, I did it. I put in two Red Hots yesterday and they sound GREAT! Low rumble with an evil crackle when I get on the gas a bit, but not tooo loud.

A funny thing happened though: I was eager to try them out as soon as I had the old (blown to shreds!) mufflers off. So I just slipped the red hots on the pipes where the old ones were and I fired it up, and found that it was really fairly quiet. No biggie I thought, it rumbled nicely, but then my dad came and suggested I put the pipes back on after the mufflers. I decided to at least try mounting them back, and man... it sounded so much better.... night and day. So what gives? Why would it be louder and more high-pitched with more piping after the mufflers?

 

Normally I would be able to explain this but for some reason my mind is blank. Almost all performance mufflers are like that though, I got pulled over in my cavalier when I have a Vortex V-baffle on it because I vibrated a cop car as i drove by. once I got out of the ticket I threw some 3" tips on it and the sound was too rice(turned it high pitched and raspy) after that so the car is now quiet again.