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I am about to have my 289 dual exhaust put on and am wondering if there are any advantanges to having an X or H pipe cross over. Which one is better or does it even matter.
 

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The X-pipe will scavenge better particularly at high RPMs.

Looking at an X-pipe it was clear to me that it would provide the best flow.

The X-pipe also has the benefit of lowering your exhaust sound a couple db's.

Is there a huge difference on a street car? Probably not. However, I would opt for the X pipe again.
 

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Search previous posts - there was a long discussion on this.

In the end the X pipe was the crowd favorite.
 

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I love my x-pipe. Sounds really sweet when you get the RPM's up. With the way it sounds, everyone wants to know what I am running.
 

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While out at SAAC-27 the number of cars running X-pipes far outweighed the number who weren't.
HP is king at these events.
You can easily hear them, because the exhaust tone makes them sound as if they were sporting a few thousand rpm's more than they were really turning.
Add a set of Flowmasters and it makes some interesting NASCAR kinda sounds.
I love it.
Some old timers (ok, I'm an oldtimer, but I don't keep my head in the sand) hate it because it takes away the low rumble a bit...but that sound at hi rpms is just flat unique.
I'm thinking of adding em to the Boss302. I will run them on the restomod.

BossBIll
 
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Get yourself the Dr. Gas X-Pipe and Dr. Gas Spin tech mufflers...you will love it!
 
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