You can do MUCH better than that. Off the flowmasters for a set of Borlas. Much better sound, performance and part throttle response. It's the part throttle sound that gets irritatingly old after awhile. You also loose performance and they drone at that particular point. It is the worst problem a chambered muffler system is plagued with.

So if you go LT's, at least go with a quality straight thru muffler (s) design. I promise you won't regret it.

 

Scrapped the fartmaster super 10 knockoff about 2 weeks ago for an Aero turbine bullet type muffler (resonator haha) made a noticable difference she sounds better and seems to have a little bit more power. Will be doing the LTs and hi flow maggie cats next income tax time. Thanks for the help I've been searching for a while to try and find a set of LTs fir my truck. I'll just order the ones for the 4x4 for an 08 and call it a day well another custom tune will be in order along with another resonator to do the duals

 

Attaboy, Bullet!

Ol' Bubber toldje ol' Brewskabobinator was a heppful, farkin' genius

Cheers!

 

There are a lot of choices and opinions out there when it comes to products, and not everyone will like the same products for various reasons. One person’s opinion can be based on mis-guided information, mis-application, personal sound preference and sometimes, for no reason at all. The best thing that you can do is research. Call each manufacturer of the products that you’re interested in and make sure that you're getting the right information for products based on YOUR specific wants and needs. Unlike most other exhaust manufacturers today, Flowmaster does extensive testing at their full time Research & Development facility with a Super Flow engine dyno, 4-wheel drive chassis dyno, race teams, engine builders, etc. for developing mufflers and exhaust systems. Sound is an individual preference, so buying based on someone’s opinion of what they like, may not end up being what you like or want. Remember to consider interior sound levels as well as exterior sound. Flowmaster offers choices when it comes to interior sound/resonance. So whether you like the drone/growl inside your vehicle while driving at different rpms, or if you don’t like drone inside the vehicle, Flowmaster has mufflers that allow you to tailor your sound to suit your taste both inside and outside of your truck. Finally, go to shows or local hangouts and talk to owners and listen to numerous trucks, especially the same make and engine size as your vehicle. That way you have an apples to apples comparison of what sound to expect on your vehicle once you make the decision of what mufflers/exhaust is right for you.

 

Exactly. My info comes from past results, seen from the Dyno and from very well known tuners. My opinion is based on fact and not hearsay.

Your job is to push your product, that's understandable. That said, your of course bias and won't post anything that's derogative or derogatory in any way. No offense, but that's truly what we should be aware of.

 

In this day and age, you can’t get away with doing business like that and keep growing the business. People can see through that quickly. Flowmaster has been in business for 32 years for good reason. I think that we all would agree that it would be easier and take much less time and money to just replicate the factory exhaust system and throw a muffler in the box and make up some false power numbers, but that’s not the case. Flowmaster custom builds and tests multiple mufflers, tubing sizes/configurations etc. when developing systems for each and every vehicle that we release for sale. This is done to get just the right sound and proven performance gains on the dyno, or the system doesn’t go to market. As for negative results, we have no control over what others may be changing besides the muffler, and how all of the variables coming into play with all the changes made, affects the overall performance...especially with ‘knock off’ or ‘copy-cat’ products. That is why I referenced possible mis-applications etc., nothing personal aimed at you or your tuner.

 

Curious, why not exploit Flowmasters Laminar Flow technology...Pro and Dbx series ? Aren't those a straight through design ?

Sure the Flowmaster may sound good to some. What bothers me is what suffers in performance with a chambered design. At cruising speeds, gases back up and, for lack of a better word, die and eventually are forced out. It's detrimental to part throttle performance. It also causes drone. It's a big enough problem that most quality muffler producers won't mess with. In fact there's only one other, other than Flowmaster that produce a chambered design.

For Flowmaster to get that unique chambered sound, some performance suffers. Great marketing skills and that teenagers ear have prevailed for them. That's great! However, there are better alternatives and yes research will get you there.

 

Are you talking about the X4? I have that. I love it. There are cheaper ones, of course, and they would probably do the same job with a custom tune, but I don't regret the purchase. My mileage also went from 12 to over 16 with a 93 Performance tune. I can't speak for MPT tunes because I didn't use theirs.

As for Flowmaster, I have a Flowmaster 44. It sounds great outside the truck but it's loud and annoying as **** inside the cabin. I'm probably going to remove it and not replace it.

 

To clarify, the following information best describes how Flowmaster’s chambered technology actually works.

Exhaust consists of air, heat, burned and unburned gases and sound. Think of exhaust as a tennis ball…since the valve opens and closes, the exhaust is made up of ‘pulses’, it has a start and an end, not a constant flow. Because of these factors, cfm testing is not a true test of how an exhaust system works. It doesn’t replicate any of these factors. Important things to consider when choosing an exhaust system for your application are: tubing size, rpm range, power level, interior & exterior sound etc. These are all important when it comes to proper exhaust performance. Tubing size determines how fast the pulses travel down the tubing to the exit. Of course, this varies with rpms, so it should be based on an average of what the vehicle is being used for (street driving vs. racing, etc). The larger the tubing, the slower the exhaust will travel, generally resulting in a loss of torque, poor mileage etc., at lower to mid rpms. The smaller the tubing, the higher the velocity, but if it’s too small, you will eventually restrict the flow at mid to higher rpms, creating backpressure. So, the key is to have the properly sized system for what the vehicles useable power range will generally be.

One of the advantages of Flowmaster's chambered muffler technology vs. a comparably sized ‘straight through’ muffler is the interior volume that each muffler can handle. Think of it like this- Take a 2.5” inlet/outlet ‘straight through’ muffler (which is just the volume of the length and inner diameter of the tubing passing through the muffler) and fill it with water and then dump it into a measuring cup. Then, do the same thing with a comparably sized 2.5” inlet/outlet Flowmaster muffler. The Flowmaster muffler would hold considerably more water than the ‘straight through’ 2.5” piece of tubing. This added volume allows less resistance (more volume for the exhaust inside the muffler) and a ‘relief’ vs. the same sized tubing of a straight through design. Another benefit is, as the exhaust splits and travels around the deflector (the V shaped baffle) and joins back together behind the deflector to exit through the collector, it does two things. First, it creates an area of low pressure behind the deflector resulting in a “pulling/scavenging” effect and helps pull the following pulses through the exhaust. Second, the deflector acts as a one way check valve and eliminates the sound waves and exhaust from reversing and running back up the pipes to the engine, messing with the tuning. The end result of this added scavenging is a cleaner burn in the combustion chamber because you're affectively reducing the contamination (unburnt gases left in the combustion chamber) which = more TQ and more power.

To address the drone of a chambered muffler that you previously referred to, Flowmaster makes numerous series of mufflers from really aggressive sound both inside & outside of the vehicle, to mufflers that contain a built-in resonance tuning chamber that virtually eliminate drone inside of the vehicle without sacrificing performance. This is why I previously stated, mis-applications and/or mis-information because one person’s sound preference may not necessarily be what another person wants. Our Laminar Flow technology mufflers are also another really great muffler option to look into. For more information on that technology, please visit www.flowmastermufflers.com.

 

Jbrew does this mean I can use 5.4 headers on my 4.6 I'm about to do this but I'd like a little better quality than pacesetter