Summit Racing SpeedCard - learn how to get 10% back up to $100

Make/Model Search
Make/Engine Search

Brands
Savings Central
Contact Us
Help Center

My Garage
Wish List
Order Status & Returns

Welcome
My Account

Order Status

Wish List
Savings Central
Shop by Brand
Shop Your Passion
- Shop Your Passion
- Truck / SUV
  
  Jeep®
  
  Restoration
  
  Stock Replacement
  
  Late Model Muscle
  
  Tools
  
  Gifts, Clothing, & More
  
  Circle Track
  
  Street Rod
  
  Powersports
  
  Paint & Body
  
  Marine
  
  Jr Dragster
Gift Cards
My Garage
See Our Catalogs
News & Events
Career Opportunities
Contact Us
Help Center
New Products
Shop by Make/Model
Sign In

Search Make/Model

Search Make/Engine

Sign In

Welcome
Account Dashboard
Profile
Order Status & Returns
Buy It Again
Wish List
Rewards Program
Gift Cards & Summit Bucks
Address Book
My Garage Settings
Email Preferences
Text Notifications
My Reviews
My Questions
Catalogs
Tax Exemption
Sign In

Summit Racing SpeedCard - learn how to get 10% back up to $100

Save With Limited-Time Deals on Exterior Parts & Accessories Today!

Filters

In Stock
- In Stock Items, Including at a Supplier. Ships In a Few Days. (5) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- All Items, Including Not In Stock (12) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Make/Engine
Combustion Chamber Volume (cc)
- 25 (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 45 (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Intake Port Shape
- Oval (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Intake Valve Diameter (in.)
- 2.250 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 2.450 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 2.520 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 2.600 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Intake Port Location
- Standard (3) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Spread (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Exhaust Port Shape
- Round (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Exhaust Port Location
- Raised (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Standard (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Spark Plug Style
- Angle (4) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Exhaust Valve Diameter (in.)
- 1.680 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 1.850 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 1.880 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 1.900 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Outside Diameter of Outer Spring (in.)
- 1.760 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Rocker Arm Mounting Style (application)
- Stud (3) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Shaft (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Price Range
Filter Options
- Made In USA (5)
- Circle Track (1)
Savings Central
- Free Shipping (2)

Selected Filters

Filter Results by Vehicle

Loading...

Home
Cylinder Heads
Product Results

5 Results Found For "proportioning valve"

Availability

- In Stock Items, Including at a Supplier. Ships In a Few Days. (5) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- All Items, Including Not In Stock (12) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Filters
Make/Engine
Combustion Chamber Volume (cc)
- 25 (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 45 (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Intake Port Shape
- Oval (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Intake Valve Diameter (in.)
- 2.250 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 2.450 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 2.520 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 2.600 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Intake Port Location
- Standard (3) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Spread (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Exhaust Port Shape
- Round (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Exhaust Port Location
- Raised (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Standard (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Spark Plug Style
- Angle (4) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Exhaust Valve Diameter (in.)
- 1.680 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 1.850 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 1.880 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- 1.900 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Outside Diameter of Outer Spring (in.)
- 1.760 in. (1) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Rocker Arm Mounting Style (application)
- Stud (3) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
- Shaft (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
Price Range
Filter Options
- Made In USA (5)
- Circle Track (1)
Savings Central
- Free Shipping (2)

5 Results Found For "proportioning valve"

Whether you race Pro Stock, Super Comp, or just want to rebuild your old Chevy 350 small block, there are cylinder heads just for you! Performance cylinder heads enhance...

Whether you race Pro Stock, Super Comp, or just want to rebuild your old Chevy 350 small block, there are cylinder heads just for you! Performance cylinder heads enhance the airflow into your engine, giving you improved power and torque. Bolt on a set of fully assembled cylinder heads for instant power gains or custom build your engine’s top-end around a set of bare castings! Plus, you can turn up the horsepower even more by choosing cylinder heads with CNC-ported runners and chambers, CNC-profiled chambers, raised exhaust runners, and other enhancements. From budget-friendly cast iron cylinder heads to lightweight...

Whether you race Pro Stock, Super Comp, or just want to rebuild your old Chevy 350 small block, there are cylinder heads just for you! Performance cylinder heads enhance the airflow into your engine, giving you improved power and torque. Bolt on a set of fully assembled cylinder heads for instant power gains or custom build your engine’s top-end around a set of bare castings! Plus, you can turn up the horsepower even more by choosing cylinder heads with CNC-ported runners and chambers, CNC-profiled chambers, raised exhaust runners, and other enhancements. From budget-friendly cast iron cylinder heads to lightweight aluminum cylinder heads, we’ve got cylinder heads for a huge array of applications, including the latest GM LS and Ford mod-motor engines.

Showing In Stock Items. Show All 12 Items.

Individual Parts

Part Groups

Results 1 - 5 of 5

Edelbrock Victor LS-R Pro-Port Cylinder Heads 770469

Made in the USA

Edelbrock Victor LS-R Pro-Port Cylinder Heads 770469

Edelbrock Victor LS-R Pro-Port Cylinder Heads 770469

Cylinder Heads, Victor LS-R Pro-Port, Aluminum, Bare, 25cc Chamber, Hot Isostatic Pressing Processed for Optimum Strength, Chevrolet, 7.0L LS, Each

Part Number: EDL-770469

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

...Loading

Estimated Ship Date: May 27, 2026 if ordered today

Edelbrock Pro-Port Raw Ford FE Cylinder Heads 61857

Made in the USA

Edelbrock Pro-Port Raw Ford FE Cylinder Heads 61857

Edelbrock Pro-Port Raw Ford FE Cylinder Heads 61857

Cylinder Head, Pro-Port Raw Ford FE, Bare, Aluminum, 45cc Combustion Chamber, NHRA Machined Logo, Each

Part Number: EDL-61857

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

...Loading

Estimated Ship Date: May 27, 2026 if ordered today

Edelbrock Pro-Port Raw Cylinder Heads 618369

Made in the USA

Edelbrock Pro-Port Raw Cylinder Heads 618369

Edelbrock Pro-Port Raw Cylinder Heads 618369

Cylinder Head, Big Victor Spread-Port 14 Degree CNC, Bare, Aluminum, Chevy, Big Block, Each

Part Number: EDL-618369

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

...Loading

Estimated Ship Date: May 27, 2026 if ordered today

Edelbrock Pro-Port Raw Cylinder Heads 614669

Made in the USA

Edelbrock Pro-Port Raw Cylinder Heads 614669

Edelbrock Pro-Port Raw Cylinder Heads 614669

Cylinder Head, Pro-Port Raw, Bare, Aluminum, Oval Intake Port, Round Exhaust Port, Chevy, Big Block, Each

Part Number: EDL-614669

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

...Loading

Estimated Ship Date: May 27, 2026 if ordered today

Edelbrock Victor DR-23 Degree Pro Port Raw Cylinder Heads 614469

Made in the USA

Edelbrock Victor DR-23 Degree Pro Port Raw Cylinder Heads 614469

Edelbrock Victor DR-23 Degree Pro Port Raw Cylinder Heads 614469

Cylinder Head, Victor, 23 Degree, Pro-Port, HIP, Aluminum, Natural, Chevy Big Block, Each

Part Number: EDL-614469

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

...Loading

Estimated Ship Date: May 27, 2026 if ordered today

1

Page 1 of 1

Modal Header

Contact us with questions.

Call To Order

This is a custom order part. You can order this part by Contacting Us.

Summit Racing Speedcard. Synchrony Car Care.

Summit Racing Equipment SpeedCard

Jumpstart Your Next Project!

View Details|See if you Prequalify

Stay Updated with Emails from Summit Racing

Never miss a sale on new parts, tools, and more!

= Required

First Name

Last Name

Email Address Email required

See Our Catalogs

News & Events

News & Events Home
OnAllCylinders (blog)
Calendar of Events
New Product Releases
Summit Racing News
News You Can Use
Featured Vehicles
Media Center
Sanctioning Bodies

Help

Help Center
Return Policy
Beat-A-Price Guarantee
Payment Options
Contact Us

Social

Facebook
X/Twitter
Instagram
Pinterest
YouTube
Podcast

About Summit

Corporate History
Retail Locations

My Account

Profile
Email Preferences
Order Status & Returns
Wish List
Address Book
My Reviews
My Questions
My Garage
Sign In

Career Opportunities

More

Summit Racing Credit Card
Gift Cards
Calculators & Tools
Promo Exclusions
Become an Affiliate
Summit Racing Rewards Program
Summit Racing Equipment Protection Plan

Terms of Use | Privacy and Security | Site Accessibility
Copyright 2026 by AUTOSALES, INCORPORATED
dba Summit Racing Equipment | Trademarks

Let's Build it Together^™

Modal Header