Are the horsepower/torque (18.7hp - 24.9 ft. lbs.) increases honest?
Link below:

http://www.a-1performance.com/magnaflow ... iberty.cfm

(quote from the page above...

"This is a great little SUV that owners love to modify. MagnaFlow will boost the power of the 3.7L V6 up another 18.7 horsepower and 24.9 ft.-lbs. of torque. The system features 2.5" fast-flowing mandrel-bent stainless steel tubing, a straight-through stainless steel MagnaFlow Performance Muffler and a brightly polished 3.5" stainless steel rear exit tip."

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BlueFreedom
2003 Liberty • Freedom Edition • Atlantic Blue/Graphite trim
Command Trac, Trak-Lok, Rusty's 2.5" Coil Lift, Full Skids, Rocky Road Steprails, Moabs and General Grabber At2s
Alpine head unit, Alpine Amps (40 x 4 + 500 x 1) 4 polk db650s and two 10" Polk subs.

Most of the gain is from the different muffler. The factory muffler is very restrictive along with the way it's assembled. Unfortunately, the CRD uses the same exhaust from the CAT back and has to accommodate even more flow from the diesel. Muffler flanges are shoved inside the 2.5 inch exhaust pipes and welded causing a constriction on both ends. If you cut in a MagnaFlow muffler on the factory pipes and remove the constrictions, you will likely have the same results.

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2005 Liberty Sport CRD, Lt Khaki, sunroof

Thankful to now be an EX-CRD owner.

I assumed the 2.5" exhaust pipe was also the stock size for the 3.7L .. I changed the muffler to a Magnaflow Polished one and got some real nice rumble out of it. I can only assume my gas mileage went up (probably .3 - .5 mpg).

A lot of folks have the whole CatBack kit and are pleased with it though. I just didn't want to spend the extra $$$ for the same sized pipes and the exhaust tip that is with it.

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<b>--PHIL--</b>
<i>(Lift, Wheels, Tires, Skids, U Know...)</i>
<b>L.O.S.T MID-WEST MEMBER #057522 </b>

After my lift and tires I put in a Magnaflow 12286 and it helped get some of the power back from the swap to bigger tires, better mileage and it has a great sound.

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'02 Liberty Limited - Patriot Blue

Agreed...You will gain some power back!

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<b>--PHIL--</b>
<i>(Lift, Wheels, Tires, Skids, U Know...)</i>
<b>L.O.S.T MID-WEST MEMBER #057522 </b>

I love it... sounds great when you open up.

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- 2005 Liberty Renegade -
Pre-Lowered Springs + Spacers
Rancho RSX Shocks & Struts
255/70/R16 Toyo Open Country A/T
K&N Aircharger Intake
Magnaflow Cat-Back Exhaust
Full Skids / Rock Rails
DrawTite Class III Hitch
PIAA Heads & Fogs
AutoMate Remote Start

One advantage to buying the CAT back is that it's a quick , DIY assembly where everthing is designed to fit together. I have been asking around several muffler shops in the area about cutting in a free flow muffler (Magnaflow or Areo Turbine). Looking specifically for a quality, welded, stainless steel installation. Every shop wanted to do a hack & bolt together job, something I am capable of doing. Mention stainless steel and welding in the same sentence, their eyes glaze over.

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2005 Liberty Sport CRD, Lt Khaki, sunroof

Thankful to now be an EX-CRD owner.

I just put a dynomax muffler on and it did make a little difference.. I also cut it where it restricts to 2 1/4 so its true 2.5 and its exactly what I wanted for sound.. Its just a little louder, where you can hear the exhaust but @70 you can barley hear it.. Highly reccomend