HUG 4666 MAGNUM INTAKE IRON RAM -BARE HEAD- HI-PERFORMANCE 62CC IRON S.BLOCK NEW CASTING! (MAGNUM STYLE ROCKERS) $311.50
 This part number & price is for a single bare head.
If you are interested in a set of these with valves, either stock or oversize follow these links.
These are brand new heads, not reconditioned.
They are considered heavy duty because they have pressed-in, hardened exhaust seats like diesel, and R/T heads(now discontinued). OEM Magnum heads are extremely prone to cracking between the seats. This is a very common problem with heads that have induction hardened exhaust seats, like the OEM iron heads. Our Iron Rams Magnum Heads #4666 have all of the bolt and accessory mounting holes and are a direct replacement for the OEM 5.2L/5.9L Magnum heads. These heads have all the original type and sized parts.
Now for the good stuff!
The heads with stock valves (as shown above) exceed the flow of the stock OEM Magnum heads and are almost equal to the stock Edelbrock aluminum Magnum head and exceed the Mopar Performance R/T heads. You should see a performance improvement by simply bolting these on.
And now for the even better stuff!
These heads, when upgraded to 2.02" and 1.620" lightweight swirl polished, narrowed stem racing valves and a Hughes Engines, Inc. racing valve job will exceed the flow of out of the box Edelbrock Magnum heads and blow away the 2.02" valve R/T heads! If you need more airflow than this, we can port this head (HPS1-Mag) or you can step up to a set of our Stage II ported Edelbrock Magnum heads (HUG4610-S2). Keep in mind that these heads can be ordered with the "LA" style intake manifold bolt pattern only (#4668) . They can also be dual drilled to accept both the Magnum & "LA" style intake bolt pattern (dual usage) for an additional $80.00 . This head is also available with just the "LA" bolt pattern by ordering p/n 4668. There is a great article on these heads in our tech section.
When using these heads with a flat tappet cam it will require that the pushrod tunnels be clearanced. We can do this for an additional charge of $40. If you need this done please make a note in the comment section when you place your order and we will contact you.
The chart below is a flow chart comparing the Iron Ram head to the OEM head and the aftermarket R/T head (now discontinued by Mopar) using our flow bench @ 28" corrected. These are averages over several ports. As you can see, the Iron Ram head with 1.920" intake valves flows better than the R/T head with a 2.02", and a lot of the time the R/T heads are on national back order...now you know what to do about it.
Valve
Lift |
| Intake |
Exhaust |
| Magnum OEM |
Iron
Ram |
Iron
Ram |
R/T |
LA '576 |
Magnum OEM |
Iron
Ram |
R/T |
LA '576 |
| 1.920" |
1.920" |
2.02" |
2.02" |
2.02" |
1.620" |
1.620" |
1.620" |
1.60" |
| 0.100" |
51.2 |
68.2 |
n/a |
61.4 |
69.0 |
55.1 |
57.2 |
65.9 |
51.0 |
| 0.200" |
121.1 |
124.1 |
119.0 |
119.2 |
118.0 |
109.0 |
114.1 |
120.2 |
103 |
| 0.300" |
181.5 |
179.6 |
177.0 |
169.3 |
176.0 |
148.4 |
155.3 |
153.7 |
131.0 |
| 0.400" |
207.5 |
213.8 |
224.0 |
211.0 |
204.0 |
170.8 |
180.0 |
168.0 |
140.0 |
| 0.500" |
209.0 |
227.0 |
247.0 |
220.6 |
212.0 |
176.2 |
187.3 |
174.0 |
141.0 |
| 0.600" |
208.4 |
233.1 |
240.0 |
220.6 |
210.0 |
178.4 |
188.7 |
176.0 |
142.0 |
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