08 6.0 catback exhaust?

[radrick]

I am kicking arounf the idea of installing a catback exhaust on my truck, not for sound but some performace gains, and MPG gain. I want a stainless system, and quite as posible. I have narrowed my choice down to the gibson single side cat back because of the claims of quiet towing clamis. Has anyone hear had that exhaust? I already have a k&n FIPK, and a superchips programmer, I hope that a freeer flowing exhaust will help alittle more/

[ATMINF]

I would honestly doubt any significant mpg gains on a cat-back system. I have a flowmaster because I like/love the sound mainly. Does it give me more HP over stock, maybe a little, but in our 6000+lbs trucks the stock pipes(your truck has a very similar chassis to the GMT-800 of mine) are pretty good, dual 3 inch pipes, to a restrictive muffler, with a 3.5 single outlet. I would also check flowmaster as they now have some full SS systems. Good luck.

[wurgs]

I have the Gibson single catback on mine and do like it. It adds a rumble just slightly louder than stock. It's stainless and very well built. They have excellent customer service. I called them unsure what I wanted and instead of steering me to the more expensive systems they sell he asked a few questions about what I was really was looking for and he recommended the single catback. His reasons were because I was looking for a nice rumble but not too loud when towing and he said the dual pipes would be too loud especially under towing conditions. I really wanted duals because I love the look of them but he convinced me I wouldn't be happy and I am really glad I took his advice. I would give them a call, they will answer your questions honestly and recommend the right product.

[Carder09]

Throw a magnaflow 13742 on and call it a day.

[radrick]

I have the Gibson single catback on mine and do like it. It adds a rumble just slightly louder than stock. It's stainless and very well built. They have excellent customer service. I called them unsure what I wanted and instead of steering me to the more expensive systems they sell he asked a few questions about what I was really was looking for and he recommended the single catback. His reasons were because I was looking for a nice rumble but not too loud when towing and he said the dual pipes would be too loud especially under towing conditions. I really wanted duals because I love the look of them but he convinced me I wouldn't be happy and I am really glad I took his advice. I would give them a call, they will answer your questions honestly and recommend the right product.

Thanks for the reply. Did you notice any improvment in fuel economy or power at all ?

[radrick]

Throw a magnaflow 13742 on and call it a day.

I dont want to cut my factory system apart incase I want to reinstall it later.

 

 

I would honestly doubt any significant mpg gains on a cat-back system. I have a flowmaster because I like/love the sound mainly. Does it give me more HP over stock, maybe a little, but in our 6000+lbs trucks the stock pipes(your truck has a very similar chassis to the GMT-800 of mine) are pretty good, dual 3 inch pipes, to a restrictive muffler, with a 3.5 single outlet. I would also check flowmaster as they now have some full SS systems. Good luck.

I know there will not be a significant mpg gain, just hoping to gain insted of loose. Thanks for the sugesstion on the flowmaster, but I like my tow rig quiet. I have flowmasters on my offroad toy.

[Carder09]

Take to a muffler shop, with whatever muffler you want, have them flange the new exhaust from the y, from there, you can have a single in, dual out or single in, single out without chopping factory exhaust and it will be way cheaper than buying a name stamped on some shiny piping. But what do I know, I only spent $700 ish for my Lt headers, custom x piping to two cherry bomb extremes dumped before the axle.

[ATMINF]

If you want to keep the factory setup to possibly reinstall at a later date, you can get the "band style exhaust clamps"(Summit, Jegs etc), cut the factory pipes at a good location, install the muffler you like, and then be good to go. Also really any aftermarket muffler flows much better than the stock setup, so you will most likely gain HP/TQ whatever you choose. And yes you are right about not getting a flowmaster if you want a quiet exhaust. Flowmaster and quiet do not go together. And like I said before I really got mine for the sound as the main reason. I have heard a Gibson in person, and it was close to stock. The only other thing that I would suggest is getting a system that has a pre-muffler (resonator), because our truck exhaust is known to have a drone if all you do is put a different muffler on it. Good Luck

 

 

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[wurgs]

Thanks for the reply. Did you notice any improvment in fuel economy or power at all ?

I really can't say for sure. They claim something like 10-15 increase in torque and hp but you know how that goes, usually a little optomistic. I also had LT tires put on at the same time because I towed a heavier rv and with the much heavier tires I actually went down in mileage a hair. I basically put the exhaust on for the nice sound and between that the the Airraid intake hoped to even out the losses from the LT tires. I had a local shop cut off my factory exhaust so I could keep it. Ths Gibson without the resonator doesn't drone any more than the stock one when it goes to v4 mode so its not bad. If you search around you should be able to find the stainless single catback for between $600-$700.