Reddit mentions: The best automotive exhaust manifold & parts

I don’t have that one, but I’ve got the ATP knock-off of it.

Bought it on Rockauto in 2009 and replaced it twice for free under warranty.

I noticed zero improvement but at this point it’s pretty far from stock engine. It looks better and definitely fits and lasts longer that the stock header.

I’m thinking a 2000 has the pre-cat manifold and I’d be concerned about emissions taking that off. I may be wrong, but I’m pretty sure my buddy’s 2000 Classic has the pre-cat.

This is the one I bought and love it

Had it about a year so far and work great. Excellent tubular design with flex joints like in later models. Bolts on real easy like.

I'd recommend getting this replacement manifold/cat. It's a bit of a tight fit, and you'll need a crowsfoot to get the O2 sensor on and may have to notch the condenser fan shroud slightly (I did on mine).

But it works really well, won't crack like that one over time, and can be repaired because it's sheet steel.

All of them will crack eventually. It's just the nature of the design.

I got this manifold back in August and so far I am very happy with it.

I put this on my '92 earlier this year and so far I'm happy.

ATP Automotive Graywerks 101212 Exhaust Manifold https://www.amazon.com/dp/B000EQLCU2/ref=cm_sw_r_cp_apa_N-xDxb2WAYAZS

U-Locks are worthless if there is any space to fit it any dope fiend with a spreader can crack one open in less than a minute, maybe two.

Like so
https://youtu.be/tX64AxTBn70

Or so.
https://youtu.be/0-eOnzrI43Y

Using one of these.
https://www.amazon.com/Lisle-13000-Manifold-Spreader-Chevrolet/dp/B0009OR94W

Or a cheap screw Jack from an old car.

If you have a nice bike get a hardened steel chain. With a shielded shackle pad lock.

Avoid Master Lock like the plague since, well they suck.

Oh and absolutely avoid any combination lock since most can be opened in a minute using one of these.
https://www.sparrowslockpicks.com/product_p/sultradecoder.htm

I don't understand what I'm looking at. What do you mean by "header"? I see the manifold (orange) and it attaches to the engine. What "header" do you mean?

I was thinking about this model because it has the flex joints:
https://www.amazon.com/gp/product/B00BMZU90I/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1

Ugly faces and a Exhaust Seal Ring for almost 18k.

Less than 200 on Amazon!

http://www.amazon.com/ATP-Automotive-Graywerks-101212-Manifold/dp/B000EQLCU2/ref=sr_1_12?s=automotive&ie=UTF8&qid=1452003996&sr=1-12&keywords=atp+automotive

sadly I don't think it fits my 1990 renix 4.0 :/

Dorman 674-196 Exhaust Manifold Kit https://www.amazon.com/dp/B000C17GUY/ref=cm_sw_r_cp_apap_VzHnddiFyhvOs

That is the manifold that I used this summer to replace my broken one. When I got into the job I found that the engine mount bushing was completely rotted out. I replaced it and have had no problems with the passenger side mount.

Usually it's an oil leak that rots out rubber bushings so the passenger side engine mount is usually ok in this kind of situation.

Yep, both the Chevy series and the Buick series. I think it has to do with their crappy exhaust manifolds where the exhaust ports are not equidistant from the manifold outlet, and perhaps the way it interacts with their specific firing order. That's just a guess though.

https://www.amazon.com/APDTY-12592082-Driver-Side-2002-2013-Silverado/dp/B00I9HUV5K

https://www.ebay.com/itm/GM-OEM-Exhaust-Manifold-12576864/142715482873?fits=Make%3ABuick%7CModel%3ARegal&epid=656048970&hash=item213a8172f9:g:HrUAAOSwWiNaocCi

Thing is, I can't be sure since Toyota's V6s have similar manifolds:
https://www.ebay.com/itm/2006-TOYOTA-HIGHLANDER-DRIVER-FRONT-MANIFOLD-25052-20220/351968131306?fits=Make%3AToyota%7CModel%3AHighlander&hash=item51f2ef78ea:g:d-oAAOSwnw9Z6Ll3

How does theirs sound, do you think? https://www.youtube.com/watch?v=lRZ408VlARQ