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PROMAXX Performance Shocker Series Big Block Mopar Cylinder Heads 9243
Part Number: PMX-9243
PROMAXX Performance Shocker Series Big Block Mopar Cylinder Heads
Cylinder Heads, Aluminum, Assembled, 84cc Chamber, 240cc Intake Runner, Chrysler, Dodge, Plymouth, Big Block, Pair
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Estimated Ship Date: May 7, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
9243
Part Type:
Product Line:
Summit Racing Part Number:
PMX-9243
Combustion Chamber Volume (cc):
84
Intake Runner Volume (cc):
240cc
Cylinder Head Style:
Assembled
Cylinder Head Material:
Cast aluminum
Camshaft Style:
Solid roller
Intake Port Shape:
Rectangular
Intake Valve Diameter (in.):
2.190 in.
CNC-Machined Combustion Chamber:
Yes
CNC-Machined Intake Runner:
Yes
CNC-Machined Exhaust Runner:
Yes
Intake Port Location:
Standard
Exhaust Port Shape:
Rectangular
Exhaust Port Location:
Standard
Spark Plug Style:
Straight
Intake Valves Included:
Yes
Exhaust Valves Included:
Yes
Exhaust Valve Diameter (in.):
1.810 in.
Valve Springs Included:
Yes
Maximum Valve Lift (in.):
0.750 in.
Damper Spring Included:
No
Retainers Included:
Yes
Retainer Material:
Titanium
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
Valve Guides Included:
Yes
Valve Guide Material:
Manganese bronze
Valve Seats Machined:
Yes
Valve Seat Machine Style:
5-angle
Valve Seat Material:
Steel
Cylinder Head Color:
Natural
Steam Holes Drilled:
No
Machined for O-Ring:
No
Heat Crossover:
No
Remanufactured:
No
Quantity:
Sold as a pair.
PROMAXX Performance Shocker Series Big Block Mopar Cylinder Heads
If you are a big block Mopar enthusiast, you know your choice for performance cylinder heads is limited. PROMAXX Performance Shocker Series big block Mopar cylinder heads are a fully CNC-machined option that flows up to 330 cfm. Don't be stuck with over-priced, under-performing cylinder heads. Let the PROMAXX Performance Shocker Series cylinder heads wake up your big block Mopar.
Features, items, and specs:
* 240cc fully-ported runners
* 5-angle valve job
* Diamond-honed guides
* Large spring pockets
* Multiple spring options
* 21-4N one-piece swirl-polished back-cut stainless steel valves
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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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