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PROMAXX Performance Maxx Series Big Block Mopar Cylinder Heads
Cylinder Heads, Maxx Series, Assembled, Aluminum, 210cc Intake Runner, Chrysler, Big Block, Pair
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Estimated Ship Date: Nov 23, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
9440
Part Type:
Product Line:
Summit Racing Part Number:
PMX-9440
Item Number:
3082353
Combustion Chamber Volume (cc):
84
Intake Runner Volume (cc):
210cc
Cylinder Head Style:
Assembled
Cylinder Head Material:
Cast aluminum
Camshaft Style:
Hydraulic roller
Intake Port Shape:
Rectangular
Intake Valve Diameter (in.):
2.140 in.
CNC-Machined Combustion Chamber:
No
CNC-Machined Intake Runner:
No
CNC-Machined Exhaust Runner:
No
Intake Port Location:
Standard
Exhaust Port Shape:
Square
Exhaust Port Location:
Standard
Intake Valves Included:
Yes
Exhaust Valves Included:
Yes
Exhaust Valve Diameter (in.):
1.810 in.
Valve Springs Included:
Yes
Maximum Valve Lift (in.):
0.600 in.
Damper Spring Included:
No
Retainers Included:
Yes
Retainer Material:
Steel
Locks Included:
Yes
Valve Stem Seals Included:
Yes
Rocker Arm Studs Included:
No
Rocker Arms Included:
No
Rocker Arm Nuts Included:
No
Guideplates Included:
No
Valve Cover Mounting Style:
Perimeter bolt
Accessory Bolt Holes Drilled:
Yes
Intake Valve Angle:
15
Exhaust Valve Angle:
15
Valve Guides Included:
Yes
Valve Guide Material:
Phosphorous bronze
Valve Seats Machined:
Yes
Valve Seat Machine Style:
5-angle
Valve Seat Material:
Ductile iron
Cylinder Head Color:
Natural
Steam Holes Drilled:
No
Oiling Style:
Through head
Machined for O-Ring:
No
Heat Crossover:
No
Remanufactured:
No
Quantity:
Sold as a pair.
PROMAXX Performance Maxx Series Big Block Mopar Cylinder Heads
Introducing the PROMAXX Performance Maxx Series Big Block Chrysler cylinder heads. For superior casting strength and durability, they are cast from A356 aluminum and heat-treated to T-6 specifications. These cylinder heads feature 2.140 inch stainless steel intake, and 1.810 inch stainless exhaust valves. Heads include chromoly retainers, hardened locks, 5-angle valve job, diamond-honed guides, and high performance valve springs capable of supporting .600 inches of lift. All PROMAXX Performance Maxx Series big block Mopar cylinder heads have the bowls blended by hand, and are assembled by professional builders. By flowing over 295 cfm and using all stock-type components, they provide Mopar enthusiasts an affordable choice in the market without sacrificing quality. Wake up your Mopar and install a set of PROMAXX Performance Maxx Series big block Mopar cylinder heads.
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Instructions & Calculators
Some parts are not legal for use in California or other states with similar laws / regulations
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