What are the advantages or disadvantages of one over the other? Don't they both equalize exhaust pressures......isn't that what they are designed for? Is one "quieter" then the other.....I have Zoomers with the X crossover and they are to loud, will changing to an H help with the drone? TIA

 

the x-pipe will yield a little better flow. Exhaust doesn't like to turn 90 degrees. Some say the exhaust is quieter with an x. The main benefit is a smoother path for the flow of exhaust.

I do not think an h pipe or x pipe will help with your drone problem.

 

The Xpipe helps delete the popping sounds from exhaust on deceleration

 

I think the x-pipe is supposed to give you more of a scavenging effect than the H design. As an individual pulse passes the oval shaped common area, it puts a little suction on the opposite pipe. I can't imagine that either design would have much of an effect on drone.

 

I've had both the standard h-pipe and an aftermarket x-pipe on my C5 and on my C6. Disregarding the subject of whether an x-pipe adds a few horsepower or not, and focusing on the sound issue, I can say without a doubt that I've noticed a sound reduction with the x-pipe. I would, therefore, recommend that you not swap your x-pipe for an h-pipe to try to reduce noise.

On my C6 coupe with a GHL exhaust, I first added some sound proofing to the rear deck area and to the bulkhead behind the seats. This produced a (very subjective) reduction in sound (both the cruising sound level and the level of drone) of about 20%. I then added an x-pipe for a very noticeable additional reduction of perhaps 30%.

If you're somewhere close to acceptable with the noise level of your Zoomers, maybe some sound proofing will bring the level down enough for you.

Hope this info helps.

-Ernie

 

Thanks Ernie.......the drone is really only bothersome at cruising speeds in 6th gear at 15-1900 RPM's but, that is unfortunately where I cruise on the highway and several hours of "drone" gets real old. Zoomers offered a longer resonator which I am going to try. Where did you get your sound deadening material?

Spike

 

Try this place. I've bought from him and he has good quality materials.

http://www.exoticvette.com/

 

I actually used two different materials. I used Dynamat Xtreme on the flat rear deck floor (about a 3' x 3' square in the middle of the floor panel with two of the corners trimmed around the storage boxes). I also applied a piece of this material to each side of the bulkhead behind the seats, covering most of the exposed panel after the bulkhead carpet was removed. The intention here was to damp any vibration of the panels. Dynamat is widely available at audio stores, I found some at a local Circuit City. This stuff is essentially a thin piece of soft rubber with a thin, moldable aluminum sheet on one side and adhesive on the other.

Over the top of the Dynamat, I used Cascade Audio Engineering's VB-4.5 as a sound barrier. This stuff is about 1/4" thick and consists of a layer of dense vinyl bonded to a layer of softer foam. The VB-4.5 kit is enough to cover the entire rear deck floor (with a little trimming) and still have a couple of rectangles left to place on the bulkhead behind the seats. There is no adhesive on the VB-4.5, so I used a few strips of duct tape to hold it in place. I purchased the CAE VB-4.5 from one of our forum vendors: Motorsport Image and Performance in Roseville, CA.

The carpets come out and reinstall quite easily, so this is something you can do in a couple of hours at home. And the sound reduction is noticeable.

-Ernie

 

and that's why I elected not to get one, I like popping sounds on decelleration.

 

I have GM off road exhaust. Drone was bad at 1500 RPM. I put a B+B xpipe on. Drone is no better, popping still there and I would say the exhaust is louder.

 

I have LG's and corsa sports with the 3 inch xpipe and mine pops on deceleration. My stock H pipe and cat back did not pop when decelerating.

I like the popping.

 

My Zoomers X pipe pops and I like it.

 

Didnt make any difference with my B&B bullets adding the B&B x pipe. Pops just as nicely...

Unfortunately, its cold, theres salt on the ground, and I miss my vette!!!

 

Thanks for the information...........

Spike

 

I know 2 things for sure.
Toyota trucks did very well last year in the Craftsman truck series and were running a H-Pipe design. Also Mr. Hill the C-6 chief engineer went with the H-Pipe.
IMHO, both choices were based on improving the performance of the car. The - X-Pipe maybe more focused on improving the performance of a vendors bank account. I could..... be wrong though.