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Old 07-08-2020, 01:59 PM
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Post Dual Exhaust System 85 GMC

Doing some work on my 85 GMC Sierra...short bed 4WD.

Installing a new set of tires today and noticed the exhaust system is pretty much shot...looking for a complete system [manifolds back]....nothing crazy for sound, just a nice tone.

Saw this complete system from Jegs...includes new manifolds. I like the idea of swapping out the 36 year old manifolds...so everything is new.

Any thoughts or suggestions are welcome.

Thanks, wilma

https://www.jegs.com/i/Dynomax/289/8...4aAmruEALw_wcB
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Old 07-08-2020, 02:08 PM
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Looks like a great kit and at an excellent price. Go for it...
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Old 07-14-2020, 08:15 PM
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Dorman sbc exhaust manifolds aren't made here. They are made in some strange world where they intend for them to crack Tom. I've replaced 2 of them on my 350 TBI engine. If your original GM manifolds are usable, they will still probably outlast these from Brazil or wherever they come from..

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Old 07-16-2020, 08:36 PM
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Default Exhaust System...

I hear you on the Dorman parts...

After a closer look I think the head pipes are fine...maybe just replace the mufflers and tailpipes...much better solution if it works.

Should be tackling it soon...I will report back.

-wilma
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Old 08-14-2020, 02:05 AM
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I used a Dynomax kit from 4wheelonline and some cheap mufflers. It has a nice sound and no drone, although I'm still considering replacing the mufflers with a better brand.
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