Engine/Transmission (1998.5 - 2002) intake and exhaust manifolds

[Dallan]

who makes the best intake and exhaust manifolds? anything would be appreciated. thanks

 

[GarrettPetersen]

Exhaust manifolds I would have to say the ATS one is the best. instsalled the BD and the ATS one and the ATS is more heavy-duty I think. as far as the intake manifolds really not to sure ATS makes the Arc flow. It looks pretty good

 

[bmoeller]

From what I've seen on the intake manifolds here, is that they don't gain you a thing. The exhaust manifolds do help a bit on spool up, and the engine does seem to breath a bit better.



I have the ATS exhaust manifold. I have a set of 6 new exhaust manifold gaskets, if interested. They were sent to me in error. PM me if you like.

 

[drury]

Whether it makes a difference in practice, I don't know, but the CFM+ intake does claim to outflow Banks & ATS. There are no hard numbers on it yet, because it's not available yet, but the Swanker (link in my signature) looks cool.

 

[p-Bar]

Whether it makes a difference in practice, I don't know, but the CFM+ intake does claim to outflow Banks & ATS. There are no hard numbers on it yet, because it's not available yet, but the Swanker (link in my signature) looks cool.

CFM+ has been shipping for a while now. I did watch the flow bench test and the CFM+ blew the rest out of the water + it's not a heatsink . The graph is hard to read I have gotten on him about enlarging that on the ads. The Swanker looks a little "caveman " to me plus being steel just another heatsink.

 

[NoSeeUm]

Probably better to install a cam or clean out the head IMO. If you are looking for more noticeable gains.



Jim

 

[AFarmer]

ATS on both is pretty nice. They're exhaust manifolds are very popular.

 

[rweis]

Did the exhaust manifold mfg's ever come up with a way to keep the torque values to set and STAY set?



Bob Weis

 

[Cummins724]

High Tech has a nice 3 piece exhaust manifold & a little cheaper than ATS. The ATS does look a little heavier, but I love my HT manifold. It does help spoolup a little too.

 

[Forrest Nearing]

Did the exhaust manifold mfg's ever come up with a way to keep the torque values to set and STAY set?



Bob Weis

use some 24v bolts and bolt spacers? the problem is that the short bolt length doesn't allow enough stretch to stay torqued... there's always safety wire! :-laf



nah, I'll just keep tightening them up every month or so