Exhaust Muffler advice

JJT81pit · Jul 6, 2019

I have a 92 lx fully stock exhaust and I want to switch out just the mufflers and leave everything else stock. I purchased 2 1/4 inch original 40 series flowmaster mufflers to replace. Should I purchase new flow tubes or can I cut and use originals. Mufflers are much shorter than stock so I’m worried about not have enough to connect. I Pretty much need help with exactly I need to purchase to do this project. Thkx for the help. I’m hoping I can just cut mufflers off and and use exhaust clamps to put new ones on but there also isn’t a hanger on the new muffler. Appreciate the help

General karthief · Jul 7, 2019

My advice would be to take the car and your mufflers to a muffler shop and have them welded on, they can add the length and the hangers needed, weld the system up nice an straight.
unless you have the lift and welding equipment it is a pain to do laying on your back and using clamps is so 80's, they do make nice pipe clamps now but you still have the hanger issue and you need that because of the weight of the mufflers.
JMO

Mustang5L5 · Jul 7, 2019

You kinda already answered your own question. Mufflers are shorter than stock and if you clamp, you'll need to overlap pipe to have enough material to clamp to

2000xp8 · Jul 7, 2019

Not worth the effort.
Buy a 2.5 inch catback and you can bolt it all on and adjust it accordingly (forever).
If a shop welds those mufflers in and anything hits the gas tank, frame rails etc. you are going back and they are going to keep butchering it.
The bolt in kit will eliminate the need for a muffler shop, which will probably bang you $100 a muffler in today's market.

General karthief · Jul 7, 2019

I suggested the muffler shop because we have a shop here that does superb work and it is not that expensive.
yes you can do the cat back systems with band clamps and the work out good too. If you already have the mufflers just take it to a shop and add them on,

RaggedGT · Jul 7, 2019

In a world full of Fb market places -CList and even eBays. Full exhaust systems can be had for cheap. Over the course of a week I acquired a nice set off Bbk shorties - Pypes X pipe with new O2sensors and band clamps from the market place. From eBay I bought new flow tubes and a pair of two chamber mufflers, all to the sum of maybe $200 bucks

General karthief · Jul 7, 2019

I guess I need to shop around more.
seen any gt40 tubular intakes for under $700?

2000xp8 · Jul 7, 2019

General karthief said:
I suggested the muffler shop because we have a shop here that does superb work and it is not that expensive.
yes you can do the cat back systems with band clamps and the work out good too. If you already have the mufflers just take it to a shop and add them on,

I know what you mean, it's just i'm one of those guys that believes things should come apart without a professional if need be.
My entire dynomax 2.5 ultraflo catback i got on sale for $259. The extra .25 inch in pipe size doesn't hurt either.
At that price, i see no point in making any effort to fit generic parts.

General karthief · Jul 7, 2019

JJT81pit said:
I have a 92 lx fully stock exhaust and I want to switch out just the mufflers and leave everything else stock. I purchased 2 1/4 inch original 40 series flowmaster mufflers to replace. Should I purchase new flow tubes or can I cut and use originals. Mufflers are much shorter than stock so I’m worried about not have enough to connect. I Pretty much need help with exactly I need to purchase to do this project. Thkx for the help. I’m hoping I can just cut mufflers off and and use exhaust clamps to put new ones on but there also isn’t a hanger on the new muffler. Appreciate the help

Ok, back to your actual question, yes, buy the flow tubes, get under the car and compare the length with the flow tubes attached to your new mufflers to see if you have enough without adding pipe. Get the band style clamps, they don't crush the pipes.

Wayne Waldrep · Jul 7, 2019

I had some Dynomax mufflers put in last year. The shop did exactly what Karthief is describing. I bought the mufflers with no hangers. The shop welded a hanger on each muffler (must have), cut the old mufflers out with a sawsall, and welded the new ones in place. $40 total. I can do all that myself but I do not have a lift and for $40 I'd be stupid to fool with it. That included the hangers btw.

EBW83 · Jul 13, 2019

I agree with the proposals above but have been partial to MAC exhaust products since the mid 90's when I outfitted my '83 single exhaust 5.0 with MAC headers, 2.5" cat's and full catback system with Dynomax Turbo muffler's. Back then U bolt clamps were provided which limited flexibility to adjust and swap out components. I loved that exhaust but was never fond of the fitment as it was designed for '86 and above. Over the axle was very tight especially on the passenger side with brake lines and such. I recently upgraded from headers back with MAC 2.5" X pipe, flow path mufflers, over the axle pipes and 3" chrome tips. Muffler flow tubes are welded and over the axle connects with clamps. I used Walker 1" band clamps which worked well. All other joints are ball and socket which allow for adjustment and quick removal. The flow path mufflers are about an inch smaller in all dimensions than the Dynomax Turbo's I had before. With the adjustable tips, I can make both sides symmetrical and it looks and sounds great. I was able to install the entire system with front tires on 8" ramps and back axle supported with jack stands. Of course having a low profile creeper at my age is mandatory. Downside is the MAC stuff is probably pricier than some will want to pay.

Exhaust Muffler advice

JJT81pit

New Member

General karthief

wonder how much it would cost to ship you a pair

Mustang5L5

That is…until I whipped out my Bissell

2000xp8

General karthief

wonder how much it would cost to ship you a pair

RaggedGT

Been here over a DECADE and still no CT

General karthief

wonder how much it would cost to ship you a pair

2000xp8

General karthief

wonder how much it would cost to ship you a pair

Wayne Waldrep

Before I post a pic, do you have one of yours?

EBW83

Member

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Exhaust Muffler advice

New Member

wonder how much it would cost to ship you a pair

That is…until I whipped out my Bissell

wonder how much it would cost to ship you a pair

Been here over a DECADE and still no CT

wonder how much it would cost to ship you a pair

wonder how much it would cost to ship you a pair

Before I post a pic, do you have one of yours?

Member

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