Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
Vehicle Info NeededPROMAXX PERFORMANCEPART NUMBER: 723-9373
370 Series Aluminum Cylinder Heads Big Block Chevy
$4,22227
Ships on 09/21/2026
Lowest Price Guarantee370 CNC Ported Series Aluminum Cylinder Heads370cc Intake Port Volume
- 370 Series Aluminum Cylinder Heads
- Big Block Chevy
- 100% CNC-Ported
- 370cc Intake Ports
- 121cc Combustion Chamber
- 2.35'' Intake / 1.88'' Exhaust Valves
- 7/16'' Rocker Arm Studs
- .900'' Max Lift
- Titanium Retainers
- Assembled, 2/pkg
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Part TypeCylinder Head
BrandPROMAXX PERFORMANCE
Package Height11.0
Package Width15.2
Package Length27.2
Weight88.0 PG
Part CategoryPerformance Parts
Maximum Valve Lift0.9 in (22.86 mm)
Part FitmentSemi Universal
Package Qty1
Package TypeEA
No Questions
No Reviews
Items You Need
![12-Point Intake Manifold Bolts [Zinc Dichromate/Gold]](https://www.jegs.com/images/mini_200/500/555/555-83255.jpg)
JEGS
12-Point Intake Manifold Bolts [Zinc Dichromate/Gold]
Part Number : 555-83255
$4689$50.99
You Save$4.10
ARP
High Performance Head Bolt Kit Big Block Chevy Late Bowtie Aluminum, World Prod. Merlin, Iron Dart, Pro-1 and Pro Top Line Heads
Part Number : 070-135-3603
$11499
JEGS
Part Number : 555-83255
$4689$50.99
You Save$4.10
ITEM YOU MAY ALSO CONSIDER
AFR - AIRFLOW RESEARCH
377cc Rectangle Port 24° Magnum Aluminum Cylinder Heads Big Block Chevy
Part Number : 033-2015-TI
$4,39290$4881.00
You Save$488.10
AFR - AIRFLOW RESEARCH
Part Number : 033-2015-TI
$4,39290$4881.00
You Save$488.10
Some parts are not legal for use in California or other states with similar laws / regulations
