XJ BoSS

So someone on here posted a link to summit racing, where dynomax will give you a 75$ rebate on certain catback qualifying exhaust systems. so i can basically get aftermarket exhaust for 25ish dollars depending on what i get. my questions are, one is it worth it? both performance wise and sound wise, and two, do i have to do any welding for install?
Any opinions, suggestions, and whatever!

s14unimog

Just buy it from Advance Auto Parts. The muffler by its self is ~$30 and all you need to do is cut off your cat back portion and re-attach it to this new muffler with a clamp. I think this is a better option b/c you get the chance to clock your cat back portion to miss the shackle.

As for sound, its the perfect tiny amount louder than stock. Nothing sounds worse than a loud *** Cherokee rolling through its automatic shifts... The only performance I saw was the absence of the rusty hole in my stock muffler... The gain, if any, won't be noticeable.

MWildmann

It doesn't have to be from Summit Racing. I got the super turbo cat-back from 4 Wheel Drive hardware and got the $75 rebate. I like the sound, don't really hear it from inside the jeep. Didn't notice much in the way of performance increase, but you probably won't see much increase from any cat-back system without other performance mods anyway. Is it a good deal? Absolutely. Is it pretty easy to bolt on? Yup. Do you have to weld it? Nope. The only real issue i had was that the tail pipe hung too low from the bottom of the bumper. I just trimmed the rear most hanger to tuck it up just under the bumper. Overall, i like it a lot. The tip is only about 2" from the bottom of the bumper, and from outside my jeep, it's got a nice growl to it.

XJ BoSS

I didn't thinkto look anywhere else, I just saw it on there, 100 something for all hardware and everything I think and than I can get 75 back. But 19 for shipping.... I'm just a little iffy on the rebate thing.

Sent from the captains chair on the planet express

MWildmann

Iffy on the rebate thing? What do you mean?

XJ BoSS

Been screwed over before on mail in rebates. It's money I don't really have to spend but if I'm gonna get 75 back why not

Sent from the captains chair on the planet express

MWildmann

Gotcha. Dynomax was surprisingly quick on sending out my rebate. $75 in the form of a prepaid visa card. I bought my exhaust in may and had my rebate in june.

XJ BoSS

Dang it's a visa? Idk I may wait to save up for a flowmaster complete system

Sent from the captains chair on the planet express

lynskynbnd

I got the Dynomax system, muffler, clamps, and tailpipe, from Amazon for $110 and free shipping!

excess650

If you NEED exhaust from the cat back, its a good deal. I THOUGHT that I could get away with just a muffler but found that my tailpipe and hangers were worse than I thought, so I ended up buying a tailpipe, clamps and fabbing a hanger. It cost me a lot more than the Dynomax would have.

If you wanna go cheap, you can get a muffler for $25-$30. Cheaper still is just eliminating your muffler with a section of 2-1/4" pipe. As long as your tailpipe exits the rear by the bumper, it won't be terribly loud.

If droning inside is a problem, make sure you exit straight out the back. A turndown causes the exhaust sound to drone into the passenger compartment.

s14unimog

That why, unless you need it, I would just do the muffler and retain your standard muffler-back portion; not having that section welded to the muffler really helps with those fine adjustments.

excess650

I bought an OEM type tailpipe (Walker) and found the turn down was also angled outward. Unfortunately, it hit the shackle when driving over bumps, and the noise was annoying. I cut it off and put an 18" straight section in place. The droning is GONE and I'm running a Magnaflow straight through, louvered core muffler. My wife even says its quieter inside than it was with the original muffler.

If you're gonna change the muffler, its 2-1/4" center inlet and 2-1/4" offset outlet. The length doesn't matter provided it isn't longer than the orignal which was ~25". You can make up for the difference (shorter muffler) with 2-1/4" straight exhaust pipe.

Yeah, you can make changes to the exhaust without spending a lot of $. Just be legal and keep the CAT and sensors in place.

taythegibs

A little off topic but still about the Dynomax system from summit. summit has two cat back systems, is it just me being dumb or are they the same thing?

http://www.summitracing.com/parts/WLK-17463/ Dynomax Performance 17463 - Dynomax Super Turbo Exhaust Systems $103.95 It says its for 1986-1992

and

http://www.summitracing.com/parts/WLK-17340/ Dynomax Performance 17340 - Dynomax Super Turbo Exhaust Systems $148.95 It says its for 1993-2001

there is a $50 difference and im wondering if im just really missing something here...

excess650

They list 'em 1986-1992 and 1993-2001.

opie1988

totally different exhaust systems. early model year has a smaller muffler and longer tailpipe, diameter may be different also.