New Exhaust System - Price, Source

[summerinmaine]

This may not belong in Tech, but:

 

I'm thinking of replacing everything from the cat to the exhaust tip, as I may have mucked up the cat with a healthy dose of leaded fuel :oops: and the muffler has a hole in it (and wasn't installed very well anyway). The remaining pipe shows the effects of the 300K miles that the MJ has accumulated.

 

Any recommendations (brand or source) for replacement cat and muffler? Any idea what I should expect to pay?

 

Should I look for a stock pipe, or just have fresh piping built by the local muffler shop. They do good but pricey work. If so, what size to maintain appropriate back pressure?

 

Thanks.

[Eagle]

Is this for a 4.0L or a 2.5L? The 4.0L euns best with a stock 2-1/4" tailpipe. The exhaust pipe is 2-1/2" into the cat, the cat is 2-1/2" and then the connector necks down to 2-1/4" between the cat and the muffler.

 

I have been very happy with Catco brand direct-fit converters from Summit racing. Since I bought my last one Summit has added another brand that's a couple of bucks cheaper, but I'd still go with a catco just because I know they work.

 

For everything else, I buy from Auto Zone. Their mufflers have a lifetime warranty, and their pipes are as good as anything other than a custom-bent, stainless steel mega-dollar system.

[summerinmaine]

Is this for a 4.0L or a 2.5L?

 

Oops. 4.0. I'd better put some detail in my sigline I guess.

 

The 4.0L euns best with a stock 2-1/4" tailpipe. The exhaust pipe is 2-1/2" into the cat, the cat is 2-1/2" and then the connector necks down to 2-1/4" between the cat and the muffler.

 

I have been very happy with Catco brand direct-fit converters from Summit racing. Since I bought my last one Summit has added another brand that's a couple of bucks cheaper, but I'd still go with a catco just because I know they work.

 

For everything else, I buy from Auto Zone. Their mufflers have a lifetime warranty, and their pipes are as good as anything other than a custom-bent, stainless steel mega-dollar system.

 

That's all real helpful! Thanks mucho!

 

Edit: Just checked Summit and they no longer list Catco. Now it's Dynomax. :cry:

[summerinmaine]

Found Catco elsewhere, but noticed that a lot of the converters offered to fit the MJ are "not to be used on Kalifornistan registered vehicles."

 

Catco doesn't say, so I guess I need to dig deeper.

 

WTF? :mad:

[Tracker]

If anyone in Ca. is looking for a complete, bolt-it-all-in exhaust system for a SWB 2.5 let me know. It passed a smog test last year.

Free, of course. 8)

[Eagle]

Edit: Just checked Summit and they no longer list Catco. Now it's Dynomax. :cry:

Sure they do.

 

http://store.summitracing.com/egnsearch ... 3&D=303153

[summerinmaine]

Edit: Just checked Summit and they no longer list Catco. Now it's Dynomax. :cry:

Sure they do.

 

http://store.summitracing.com/egnsearch ... 3&D=303153

 

But unless I'm reading it wrong, that's only for the I4 and the V6, not the 4.0L. :dunno:

[SuperWade2]

Edit: Just checked Summit and they no longer list Catco. Now it's Dynomax. :cry:

Sure they do.

 

http://store.summitracing.com/egnsearch ... 3&D=303153

 

But unless I'm reading it wrong, that's only for the I4 and the V6, not the 4.0L. :dunno:

 

That's got to be the Summit website guy being to lazy or too ignorant to know (or post on the site) the difference between I6/V6...

[Eagle]

Edit: Just checked Summit and they no longer list Catco. Now it's Dynomax. :cry:

Sure they do.

 

http://store.summitracing.com/egnsearch ... 3&D=303153

 

But unless I'm reading it wrong, that's only for the I4 and the V6, not the 4.0L. :dunno:

CTO-4029

 

http://store.summitracing.com/partdetai ... toview=sku

 

You're right, it says it fits the 4-banger. However, it's the one with the 2-1/2" inlet, 2-1/4" outlet, and flanged inlet. And 4029 strikes a chord as being the number I've been buying. I thought I still had a box in the basement, but I just looked and it's not there so I'll have to trust the memory.

 

Here we go -- there's another screen showing all applications for that number:

 

http://store.summitracing.com/partdetai ... pplication

[summerinmaine]

CTO-4029

 

http://store.summitracing.com/partdetai ... toview=sku

 

You're right, it says it fits the 4-banger. However, it's the one with the 2-1/2" inlet, 2-1/4" outlet, and flanged inlet. And 4029 strikes a chord as being the number I've been buying. I thought I still had a box in the basement, but I just looked and it's not there so I'll have to trust the memory.

 

Here we go -- there's another screen showing all applications for that number:

 

http://store.summitracing.com/partdetai ... pplication

 

Great, thanks!

 

I zeroed in on the 4029 from another website, so that looks right, and it's a 50-state compliant cat, so that works for me. :clapping:

[Imperial21]

Just changed all my exhaust 2 days ago--a chuck of platinum broke loose and plugged the cat. I went with a 2.5" universal cat( with adapters of course) to a 2.5" "Cherry Bomb turbo" muffler and into a short 2.5" tailpipe with a turn down--It sounds MEAN and its got a lot more nads now!