Ok I'm down to two companies that I like Bassani or Magnaflow which one do you all think is better and where is the best place to buy it. This is for 02 Z-06

 

Last week I had the Magnaflow installed. Looks and fit great, got rid of the exhaust jingle. Any x-pipe will tone down (read make quieter)the exhaust tone. This is on a '02 Z06.

 

:iagree:

 

I have the Bassani, excellent quality, my buddy has the Corsa, again, excellent quality. Not sure you can go wrong with any of them? I've had Bassani stuff before and the quality was always excellent. Maybe it comes down to price if they're all about the same... :cheers:

 

Dr. Gas

 

Magnaflow :yesnod:

 

Corsa X pipe, made a big difference :yesnod: :yesnod: :yesnod:

 

:iagree:

 

:iagree: MagnaFlow

 

Installed the Bassani X-pipe. Excellent quality and fit was great. Had no previous experience with the different vendors having X pipes. One factor that I considered was the construction of the X. The Bassani has two stamped plates that are horizontally welded together with a large opening between the two pipes as opposed to the two pipes joined together on their sides with a smaller opening, with the assumption the larger opening is less restrictive etc.

Is anyone aware of a technical comparison on the various vendors X pipes ?

 

:iagree:

 

An X-pipe comparo would make an interesting magazine article.

Most people agree that all X-pipes make a few hp/tq at best, so differences between brands are likely to be small. If there was a big difference, we'd probably see advertising to promote such a fact.

Based on design, there appear to be two common types: elliptical cross section (Corsa, Magnaflow, Dr. Gas, most others) and open chamber (Bassani and resonator type designs).

I would guess open chamber type designs to be slightly quieter and smoother sounding (and have less interior resonance). Some may argue that elliptical cross section designs flow better. Since no one has advertised such a comparision, it's not likely to make much of a difference.

Some people just want a jingle-pop eliminator, so quieter and smoother may not be what they are looking for.

As with all exhaust mods, listening to cars with various brand components can help you pick the one(s) you'll like the best.


[Modified by johnC5, 1:58 PM 5/26/2003]

 

Magnaflow all the way.

 

Since we're on the subject. Why go from the h-pipe to an x-pipe instead of a straight pipe? I've just always wondered.

 

Sound preference and shape of HP/TQ curve. The only manufacturer to post a dyno plot (that I could find) was Magnaflow. In their graph, peak HP increased, but a loss was shown at lower RPMs. It appeared that net HP remained constant.

The factor H-pipe, while jingle-prone, appears to do a good job at eliminating resonance. I've read reports that in some cases X-pipes add resonance at low to mid RPMs. This probably depends on what type of exhaust system is being used and perhaps build variance.

The best way to decide if you want an X-pipe is to listen to other cars with various combinations of X-pipe brands and exhausts.

 

From the Dr Gas web site, exactly as stated w/o any changes, deletions etc

Note the refernce to sound and increases in horsepower and torque

In Sync...HUMM...
The Dr. Gas Crossover


Remember that radio and TV commercial about the piston engine going "Boing-Boing," when it out to go HUMM? Well, all V8 engines with 90 degree cranks, have an out of sync imbalance in their firing order between the right and left cylinder banks. Yes, they do go "Boing-Boing." The firing order imbalance is a necessary sacrifice for dynamic balance of the rotating and reciprocating crank, rods and pistons. Each time the firing order is completed (two full revolutional), two cylinders within each bank will fire and exhaust within 90 degrees of each other. These two cylinders will be exhausting into the header collector or exhaust manifold almost simultaneously. This overlapping condition creates a lot of back pressure and a pop sound. Meanwhile, the opposite exhaust manifold has no activity (or pressure) in it at all. This is where the characteristic, low harsh popping V8 sound comes from.

The most common way of reducing this out of sync imbalance is with rebalancing crossovers such as H pipes and over-and-under X style crossovers. These provide both noise reductions and efficiency (power) improvements. H pipes are effective only at low and mid range. The over-and-under X crossover works a little better but still does not completely rebalance the exhaust at high RPM.
Dr. Gas, Inc. has developed a new generation of crossovers that uses a tangentially siamsed junction, in place of the H or over-and-under X. It evenly splits, smoothes, and synchronizes exhaust pressures at all engine speeds. The high and low pressure pulses in the two pipes are evenly imposed on each other, leveling out the pulse time history pressure differences between right and left cylinder banks. Re-synchronizing the exhaust pulses reduces back pressure, cancels sound, and provides additional scavaging. Tests have sound 6 dBa (75%) reduction in sound levels, and increases of 10 to 30 hp, and up to 40 ft-lbs. of torque! Economy, and throttle response are improved. Exhaust flow after the crossover is completely smoothed out. The job the headers started is finished.

One of the most appealing benefits of this system is the modified exhaust note. The deep growling and popping sound is replaced by a higher pitched smooth sound. The exhaust note is similar to a 180 degree header system without the nightmare of tubing.

Dr. Gas crossover kits replace the first 3 to 4 feet of the exhaust system with pre-bent mandrels pieces. Simply measure, cut and weld into place. The system is universal fit for most header applications. After the crossover, any type of dual exhaust, converters, or mufflers may be used with little or no effect on power. Vehicles that have problems meeting sound limits at local area tracks can also benefit with an increase in power tool. And so, the piston engine can go HUMM!

Back

 

Dr. Gas X-pipes have an elliptical cross section. They'll perform about the same as Magnaflow, Corsa, A&A's, etc:



There are a few problems with Dr. Gas's write up:

10-30HP and up to 40TQ gains? Do they have dyno graphs? If x-pipes produced that kind of improvement without any drawbacks, they'd likely be standard issue on the C5.
6dBa (75%) reduction in sound levels? Perhaps 1dBa on a C5 (A-weighted, 6 ft from the exhaust tips). Also, sound cancellation only occurs when the waves are out of phase. When they are in phase, sound is amplified... Depends on engine firing cycle and RPM.

One thing the experts do agree on is to place the x-pipe about 18" from the (header) collectors (before the cats). Most x-pipes for the C5 are after the cats.

Pick any brand that meets your sound/cost/quality requirements and you'll be happy. :yesnod:

 

JohnC5:

Agree, if the HP & torque increase was that great with the X, then why did the Corvette engineers go to the extent they did to get the 405HP, or go higher ? Yet, there must be at least four or five different manufacturers for the X.

Have yet to be able to find an independent report with the before and after for an X installation. Since I did install the Bassani, I have contacted them for opinions on the benefits of using the X pipe. " If " I recall correctly, the Bassani X is factory installed on a new Cobra R model, but will verify.

 

Response received from Bassani on the horsepower and torque increase using their X pipe:


Subject: RE: X pipe: 2002 Z06


The reports I have received from owners are 5 to 6 pounds of torque and a
horsepower gain of 10 to 12, on the C5 and not the ZO6. The ZO6 will
probably be a bit higher. We have not had that on the dyno ourselves.

Thank you,

Sheldon Dzodin
Sales Technician
Bassani Xhaust
2900 E.La Jolla
Anaheim, CA 92806
Toll Free: 866-782-3283
Tel:(714)630-1821
Fax:(714)630-2980
sheldon@bassani.com http://www.bassani.com

 

I really don't think it matters! I have the Corsa X and it's just fine! It is made well and has the bracket to attach to the hangers in the perfect spot! Perfect fit!