Mustang Exhaust Help

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10-20-2010, 08:19 PM

#11

TRUEBLUE3934

4th Gear Member

Join Date: Sep 2009

Location: NC

Posts: 1,481

From personal experience, I would not reccommend matching an O/R X-pipe with chambered (Flowmaster) mufflers. I did it for two days on my car before I had high flow cats welded in to get rid of the terrible resonance at my cruising rpms of 2000rpms. An O/R H-pipe sounds good with chambered mufflers and as mentioned above, the RWHP difference is 1 or 2 at the most. I would not chose the mid pipe based on any perceived difference in power. If you decide to run an O/R X-pipe, go with a straight thru type muffler.

Youtube can be helpful, but be aware of what other mods (exhaust or otherwise) have also been done to the car in the clip.

10-20-2010, 08:48 PM

#12

Rockwell28

4th Gear Member

Join Date: Jun 2010

Location: TEXAS

Posts: 1,452

Quote:

Originally Posted by frarey17

So I recently bought a cat back flowmaster american thunder exhaust kit. I want to get rid of my cats as well. I know i need the o2 sims but i am wondering what i should put in place of the cats. off road h pipe? x pipe? suggestions please. A friend of mine said h pipes would give more of a boost in hp than x pipe but when i read from other peoples posts they say the opposite

The x does make more power but IT IS Minimal but 2 is bigger than 1 lol. but if you want the best sounding midpipe to go with a chambered muffler I wouldnt recommend an o/r x pipe T H will sound better/deeper with the chambered muffler. I did it myself for awhile with the o/r x and flows but ended up putting on hi flow cats and that cleaned the sound up alot. You will get a bigger number on the dyno with the x pipe een though it may not be Much higher than the H. H for the sound!