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MAGNAFLOW XL PERFORMANCE is our mid-level performance diesel system featuring a 100% stainless steel muffler and mandrel-bent stainless steel tubing with a single wall tip.
MAGNAFLOW PRO PERFORMANCE is our entry-level performance diesel system featuring a 100% stainless steel muffler and mandrel-bent stainless steel tubing. Optional 5â€ diesel tips are sold separately.
MAGNAFLOW DIRECT-FIT MUFFLER KIT If you want to get some of the sound, looks and performance of our full cat-back systems, but are working on a budget, consider Magnaflowâ€™s all new 100% stainless steel direct-fit muffler kit.
All four lines are 100% stainless steel AND backed by a lifetime warranty.
Our systems feature straight-through flow designs for the ultimate in unrestricted horsepower and torque for big power while maintaining exhaust efficiency.
The internal MagnaFlow muffler is designed from stainless steel perforated core, stainless steel wool, and an acoustical absorbent material — superior to fiberglass (which many other manufacturers use). No baffles, chambers, or louvers. No restrictions at all, just straight-through, wide-open performance with a smooth, deep addictive tone and each MagnaFlow stainless muffler has a highly polished mirror finish for a show car look.
Our systems give a 20% reduction in bends over your OEM system to provide the power you demand.
Profusion Customs will be able to advise you on which muffler sizes to use on the cat-back exhaust systems for cars and trucks, so that you can obtain a good idea of what muffler is right for your vehicle.
Do you want a stainless steel or aluminised muffler?
Answer: The main difference between the two is the outer shell of the mufflers. Stainless steel mufflers have a polished stainless steel shell and are 100% stainless construction. Stainless steel is more appealing and will never rust. Nothing looks better or lasts longer than stainless steel. The aluminized mufflers have stainless internals and necks but have an aluminized outer shell. Moreover, the aluminized steel has only a protective coating which, if scratched off, may rust. Both mufflers have identical internal construction and materials, therefore both offer you a lifetime warranty and will give you that Straight-through Wide Open Performance with no restrictions. No restrictions equal better flow, and better flow equals more horsepower.
Sound of the mufflers?
The bigger the muffler, the quieter the exhaust.
We can check for which muffler sizes we use on our cat-back exhaust systems for cars and trucks, so that you can get a good idea of which muffler is right for your vehicle.
It is a fine line to reduce back pressure while maintaining good exhaust velocity. It is not about getting the biggest pipe; it is about getting a more efficient pipe diameter while maintaining exhaust velocity.
There has to be a balanced design to enhance the maximum engine output, exhaust gas velocity, and sound. For example, imagine blowing air through a straw (comparing it to a smaller diameter pipe). This would take time to release all the air from your mouth, and you would feel pressure in your mouth while doing so. Now imagine blowing air through a paper towel roll (comparing it to a larger diameter pipe). You will relieve all your air much faster and feel little or no air pressure in your mouth because of the larger capacity of the tube. This is why it is important to get the correct size piping in order to relieve back pressure while maintaining thermal efficiency.
Use the guide below when calculating pipe size for custom exhaust work. Keep in mind that the goal is to improve exhaust flow. In most cases, just changing the restrictive OEM muffler and replacing it with the same size straight-through, Wide Open Performance MagnaFlow muffler will do the job.
To reduce additional back pressure, the OEM exhaust tubing can be replaced with mandrel-bent tubing of the same size or one size up from the OEM. As a general rule, you can enlarge the pipe diameter of your OEM exhaust system by 1/4 to 1/2-inch to increase your horsepower. However, any additional increase in pipe diameter is likely to decrease your performance; specifically, low end torque.
|ENGINE SIZE||HORSEPOWER||MUFFLER INLET/OUTLET|
|Single Exhaust||Dual Exhaust|
|150-200 CID||100 to 150||2″to 2-1/4″||2″|
|200-250 CID||100 to 200||2-1/4″to 2-1/2″||2″ to 2-1/4″|
|250-300 CID||150 to 250||2-1/2″ to 3″||2″ to 2-1/2″|
|300-350 CID||200 to 350||2-1/2″ to 3″||2-1/4″ to 2-1/2″|
|350-400 CID||250 to 550||3″ to 4″||2-1/2″ to 3″|
|Use as a general guide for engine size and performance|
If you didn’t find the answers you needed on this page, please send your questions to us at:[email protected], or call our Tech Line on (+44) 01753-686878 and one of our MagnaFlow tech staff will help you.
During the final polishing process, the compound that is used to polish the metal (which is actually comprised of other metals ground into fine particulates), becomes embedded in the microscopic pores of the tip. Eventually, these fine particulates from the compound oxidize and change colour, giving the tip a yellow/gold appearance. This is accelerated with heat and with exposure to harsh climates.
In some cases, the tip may turn blue, which tends to be from heat. Some vehicles, especially modified vehicles, see increased exhaust temps as a result of their modifications. Even if the vehicle is not modified, some vehicles simply produce more heat than others and single walled tips are especially susceptible.
Discoloration is more prevalent in stainless tips, particularly single-walled tips like this:
Why? Because single walled tips lack a thermal barrier. As a result, the entire tip is directly exposed to a great deal of heat which accelerates oxidization.
Double walled tips feature a lined inner wall like this:
As a result, the outer shell of the tip is insulated from heat. This helps slow the discoloration process. However, eventually, all tips can change color, even Stainless tips (note the name: StainLESS, not Stain PROOF)