Guess they're for mounting an Econorail scoop, lol

I don't mind the injector bosses though.

That really would be a good boss to drill and tap for a scoop pan or wire looms. Hmmmmmmmmmm small gears in brain turning. lol

I'd suspect it would be prone to having a big dip in the torque curve below the torque peak, similar to what the ported Stage VI 4150 intake showed when dynoed with my old Stage VI heads. Probably pull hard up top, though.

I had a similar thought. There is a lot of material on the top side of the ports in the TF heads so I think it could be done. Not sure if it would improve flow or not, I suppose it depends how skillfully the port was reshaped.

Another idea (more work of course) would be to use the 337 intake to make a "high port" TF head. Match up the head to the top of the intake runner and then fill in the bottom of the ports to keep the runner volume at 240 cc. I think that would work really well but it would be expensive to build and probably fairly fragile.

Hypothetically... If I wanted to spend the $$$ for one of these to sit on my shelf for a few years and gather dust, where is the best source to acquire one?

Your local Dodge dealer should be able to round one up for you. Free shipping too.

Might want to check with double00joe, I think he might have one......which I believe be got right from MP.

Is there a lowdeck version of the 337?

Nope. (not unless you consider Stage VI heads on a low deck)

Mopar Performance could've built one, but the chances of than happening now are zero. They don't even like the 337 intake that they do have! They killed it off a few years back and Zippy got them to bring it back after I wrote a magazine article telling everyone about it. But I don't think there is anyone left at MP anymore who cares about big block engines.

They would rather sell us a $23,000.00 Hellcat engine in a crate.

No love for the heritage of the brand whatsoever...

I give MP as little of my money as possible these days.

That 337 plenum looks nice. Appears to look a tad better than the M1. Looks like the roof into the runner has a pretty decent shot to the head for as cast intake.

shows there are only 3 left in Sherwood...... $195 dealer net....

I was told if I ever use one that it will sit just over my indy valley tray plate that I use with my EZ heads ? So I was told I can leave my indy valley plate on and it will clear it and the bolts and bolt right on my eng ? Ron

Yes that might be correct. I ran the 337 intake on top of my billet valley cover. I think I had to use button head screws but that was it.

If Mopar would have cast this intake with the ports the same size just moved together with the normal center port divider width it would have been an easy match to std. port heads. You would just have to raise the top of the port and not have to widen them also.

Ron,

I have an Indy valley plate on my low deck under the 337 with the Chapman Stage VI's, I went ahead and drilled bolt head clearance under the manifold, not all the way through, just enough to clear the valley cover bolts.

I think your 493 motor is going to be right at the cusp of whether the 337 works almost as well, the same, or better ET/wise than the 440-2D. It depends really on the stall and if your car ET's relay more on torque (which I suspect), or top end power. And if it is better it may just be because your manifold is unported. Porting the lower plenum on the 2D is worth an easy 20 hp on what you already have, maybe more. It's about a 40 CFM difference, I (suprisingly) had to jet-up after I ported mine. Don't remember what you're CR is, the 517 I have is right at 11.7:1. There's no question the 337 will flow more air up top, it's just a question of which (and not all may) combinations benefit overall from it.

In order to achieve it's power potential, the intake must flow several % better than the port it feeds; On the 2D unported/ out of the box, your Upper can flow about 360 but the lower only flows about 320, so 4 of your 8 holes may be 'choked' above maybe 4800rpm on a 500" motor with the Ported EZ heads that probably flow ~360.

I installed the 337 on a RB with EZ heads and the Indy 440-6R valley cover. I just had to trim the ends on the bottom of the plate of the manifold. No biggie..... Just did it with a hand grinder.

Thanks Andy , Streetwize and Dwayne. I appreciate your input. I kinda feel the 337 is the only single plane that would fit under my hood and I just feel it would be nice to try a single plane one day just to see how the car runs compared to the dual plane Indy intake which I like alot and the single plane may not be any better on my car. Course as all of us drag racers know sometimes you will never know unless we try it and one day I may give it a shot. Might not be this year and it may not be for a few years or more but when the time is good for me I want to try the 337 if not for my own curiousity to see if the car likes it. Wize my comp is 10.6 and the head flow as I believe 329 @ .600 on the intake as Dwayne gave me my flow sheet on the heads but I have not looked at it for a bit although I am pretty sure it was the 329 @ .600. Thanks again for the advise and input from you all as I dont want to hijack this post from the OP. Ron

There are now 2 left in Sherwood..... I'd say once they're gone.... they're gone for good! I'm tempted to buy them and see if I could flip them at MaTS!

Would it really hurt anything to run this with a std port head? I always thought that since air is drawn from the cylinder, a larger port on the intake wouldn't make much difference. Can someone educate me as to why this would or wouldn't work well?