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Category : B- Small Block Dodge Magnum : Cylinder Heads : Iron : Iron w/ Magnum Style Intake

HUG 20300




This part number & price is for a single bare head. It does not include valves or springs.

This is a powerful cast iron replacement head for Small Block  Magnum applications.
 This head is designed for use with the Magnum intake manifold, rocker arms, and valve covers. The MA-X head features a Magnum pedestal that is large enough to enable 7/16”-14 drilling and tapping for use with stud-mounted rocker arms and guide plates.This head is designed for use with 8mm intake (1.92” diameter) and exhaust valves (1.625” diameter).

 A cast iron replacement, the 360 X Head series is designed for Magnum applications (318-360-415cid). With a host of additions and improvements over the factory originals, these heads are an easy way to get 400 to 550 horsepower out of your Mopar-powered street machineFeatures of these impressive heads include 179cc intake and 67cc exhaust runners, a 62cc combustion chamber, multi-angle intake and hardened,radiused exhaust valve seats, an improved valve guide design and a highly efficient water jacket to prevent engine hot spots. The 360 X Cylinder Heads also come with an extra thick deck surface to enable angle milling for compression.

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. If you need this done please add it to your cart below in "Related Parts".

 To view the flow chart for this head click the button below.

Heads tested on Hughes Engines bench with no work & Corrected @ 28"

Lift Intake Average CFM Exhaust Average CFM
.100 66  
.200 116 91
.300 177 138
.350 202 155
.400 224 167
.450 239 171
.500 252 174
.550 262 176
.600 263 177
.650 263 179
.700 246 179


Features & Benefits:
• Performance heads available for bothSmall Block Chrysler LA & Magnum engine applications
• 179cc intake/67cc exhaust runners & 62cc combustion chambers
• Hardened multi-angle intake (1.92” dia.) & radiused exhaust (1.625” dia.) valve seats
• Dual pattern exhaust bolts (standard & W2) & improved valve guide design
• Highly efficient water jacket with extra thick deck faces

Related Parts:

HUG 1110VSK-M Installed Spring Kit 

HUG 1129VSK-M Installed Spring Kit (recommended for Super Charger applications)

HUG 1120VSK-M Installed Beehive Spring Kit  

LAB AUTOHEAD953 : Clearance Pushrod tunnels for flat tappet cams


1110 Spring Kit Installed :  Includes Springs, Locks, Retainers, Seal  

1120 Spring Kit Installed 5/16" Vlv :  Springs, Seals, Locks And Retainers Inst    

ARP 144-3604 Bolts, Head Set Iron Magnum: ARP Brand Hex Head, Magnum 318 & 360 Eng 

7183S Bolts, Head Set Iron Magnum:Stock OEM Style Hex Hd, Mag 318 & 360 Eng  

Fel Pro 9898pt .054" X 4.172" Bore :  Felpro Standard Gasket   

HS9898PT2 Gasket, Head Set Magnum V8 :  '98-'03 5.2 & 5.9 Magnums Fel Pro Kit   

1550 Rocker Arm Kit  Stainless Steel   

1555    Shaft Mounted Rocker Arm Kit     



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