Question about 2005 Mazda RX-8

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Exhaust I was wanting to know if I cut the stock mufflers off an added n1 titanium mufflers an just cut everything but the cat off it if that would work?

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Good Day,

Most aftermarket exhaust systems are cat-back. You defiantly need to keep the cat to comply with local emsisions regualtions. However you can remove the mufflers and replace them with high flow mufflers or resonators. Try to replace them with something not too loud so you are in accordance with noise laws in your area. I have a 2000 s10 with no mufflers, just a cat then a y-pipe to make it dual with two resonators coming straight out the back, I live in the states and made sure this sytem was 50 state street legal before I purchased it. I suggest you do the same to avoid harrasment by the police.

Good Luck

Hope this helps.

Posted on Jun 30, 2008

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How much does it cost for the exhaust


Most after-market exhaust companies offer four types of components:
  1. Cat-back exhaust systems - anywhere from $300 to $1200 - The final cost will depend on steel thickness and type, as well as muffler quality.
  2. Axle-back exhaust systems - same as above
  3. High performance mufflers - $75-$300 - The quality of the muffler's materials inside, as well as the type of steel and thickness used, impact the final price.
  4. Exhaust system tips - $25-$150 per tip - Almost all cat-back or axle-back systems include a quality exhaust tip. However, if you're building your own system, you can purchase an exhaust tip to "dress up" your factory pipe.
The schematic below shows where the "cat" (a.k.a. catalytic converter) is in relation to the engine. While many companies sell high-performance catalytic converters, they are fairly expensive and usually don't restrict exhaust flow too much, so we're not going to worry about them here.
alt="Exhaust system schematic with notes">

This is a stylized schematic of an exhaust system.
On some vehicles, the muffler is mounted behind the rear axle. In this case, exhaust manufacturers sell "axle-back" systems. The only difference between a cat-back and an axle-back exhaust is the length of tubing - both include a new muffler. Therefore, there's not a lot of cost difference between the two. Both cat-back and axle-back systems include tubing, a muffler(s), and then all the hardware needed to mount the new system in place of the factory system. Most of the time, these systems use the factory exhaust hangers to make install as easy as possible.
Since a high-performance muffler is a part of a cat-back or axle-back exhaust system, buying a muffler by itself is usually the least expensive option in terms of parts cost. Keep in mind, however, that mufflers have higher labor costs. They're not necessarily less expensive by the time all the labor costs have been accounted for.
Muffler Only vs. Cat-back or Axle-back The biggest advantage in purchasing a full cat-back or axle-back system is that install is really simple. Many of these systems can be installed at home with basic tools. Conversely, installing a muffler at home may not be so simple - cutting and welding may be required. What's more, some after market mufflers require significant re-routing of your stock exhaust tubing...and that can get expensive very quickly.
The other advantage in a full cat-back or axle-back system is that they are often tuned to your specific vehicle and the included muffler(s). All things being equal, a cat-back or axle-back system will perform slightly better than a muffler only.
Stainless Steel vs Aluminized or Galvanized Steel The main difference between a stainless steel exhaust system and an aluminized or galvanized system is durability. Stainless systems will last a lifetime due to their ability to resist corrosion, with 200 300 series stainless systems being more resistant than 300 200 series systems (only the difference is slight). Some manufacturers will try and convince you that one type of stainless system (200, 300, or 400) has better sound quality than another, but there's no evidence we're aware of to support these claims. In fact, stainless steel tends to be slightly thinner than aluminizied steel. If anything, an aluminized system may have better sound quality.
Having said that, the muffler itself is the biggest factor in sound. The steel used in the system isn't as important as some make it out to be (at least in terms of sound quality).
When it comes to choosing between stainless and aluminized systems, it's important to consider your local environment. If you live in an area where corrosion risks are high (such as cold-weather areas that use salt to de-ice roadways), stainless steel may be a reasonable upgrade because it will resist rust. On the other hand, if your local environment is dry and the corrosion risks are low, the only reason to buy a stainless system is for looks.
Exhaust Tips There are probably thousands of different exhaust system tips available. Generally speaking, you get what you pay for. Stainless steel tips are very resistant to corrosion, but they don't shine up as nicely as chrome. Also, stainless steel tips are more likely to "blue", or change color during use. Titanium is also a material used to make exhaust tips - it's incredibly corrosion resistant, but just like stainless it's prone to blue during use. If you like the blue coloring, titanium is probably your best choice. If you want the shiny look, chrome is the way to go. If you want a tip that you can shine up every once in a while - but that's also resistant to the elements - stainless is a smart choice.
Exhaust System Labor Costs If you purchase a cat-back or axle-back exhaust system, labor costs are often very low. These systems bolt-on and use the existing factory hangers. In fact, many performance shops will install a cat-back exhaust system free of charge if you purchase it directly from them.
If you decide you want to purchase a muffler only, you'll want to get an install estimate from your local exhaust shop BEFORE you buy that muffler. Sometimes, installation is very straightforward and the cost is as little as $100. Other times, fabrication is required and the cost can be as high as $300 (or more). If the installation requires a lot of fabrication, you may be better off buying a cat-back or axle-back system instead.

Sep 16, 2015 | Cars & Trucks

1 Answer

Change the stock mufflers need to know size to buy


Unless you have modified the engine in your new car and thereby voided the warranties, the existing exhaust system is adequately sized. If you want louder mufflers you should be able to replace those safely without endangering your warranty coverage, but read the fine print in your 3/36 bumper to bumper and 5/50 power-train warranties. Anything behind the catalytic converters is generally fair game (cat-back conversion) but again read your warranties. I have about 17 months left on the power-train warrantee on my 2010 Challenger before I will even think about any modifications.

Apr 06, 2014 | 2014 Dodge Challenger

1 Answer

What is the right exhaust to use for a high compression setup on an h22a?


for exhaust, if you want stock looking then get a prelude muffler and have a shop make the piping the same size as the prelude exhaust (which is 2.25 i think?)
if you want sleeper exhausts then
get two 2-1/2" dynomax race bullets $27.95 ea. from summit. and a Magnaflow street muffler in your style of choice. $120?? get 1 race bullet welded in just behind the cat or header and the other back before the first 90 degree bend and the muffler welded on.

This is the best way to make a super sleeper. Magnaflow's are super quiet.

Race bullets act as resonators. they are only available in 2.5" in/out but thats ok.


Dec 20, 2010 | 1998 Honda Prelude

2 Answers

Want more horse power forcheep


K&N air filter and a tornado ...which is a device installed inside air intake duct that swirls and speeds up the incoming air

Jun 28, 2009 | 2001 Chevrolet Silverado 1500

1 Answer

Exhaust system


It had 2 cats original but I always got a better exhaust sound by taking one out.

Apr 22, 2009 | 1987 Ford Bronco

1 Answer

Is$175.00 for one flowmaster super 44 series muffler too much?


Heres the bottom line...My dad used to tell me that nothing is worth more than you are wiling to pay for it.
What you now have is a mix of unmatched components that sound nice, and possibly may give you a one or two mpg increase. However, a good exhaust system is carefully engineered to take advantage of sonic as well as physical, laws that influence the way both sound and air (exhaust) behave in certain diameter pipes, when traveling at pre-determined speeds.
Most stock exhaust is far from that, rather, it is the cheapest easiest means to permit exhaust to escape from the engine while making the least amount of noise, while keeping the converter operating. Therefore anything you do to lower pressure will give you somewhat of a performance gain. In using a part of the stock system, you cancel some of that gain by creating another restriction. I'd be satisfied with what you have but would be concerned about passing a state inspection. If you want to learn more about exhaust and how it influences your engine there are many good books you can read on this subject. (I know that because I probably read them all as a pro racer).
Good luck with your Jeep!!!

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1 Answer

Catalytic Converters


You are correct. That portion of exhaust is indeed a catalytic convertor. This would be in the rear portion of the pipe with a flexible section that goes underneath the oil pan. Then you have a long muffler and a final muffler in the rear of the vehicle.

Nissan Scope Technician- 10+ years experience in Nissan dealership

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