Description

Description

The Chrysler SB Steel SFI Flex Plate – LA 360 Small Block External Balance – 727 & 904 Compatible is designed to connect the crankshaft of a Chrysler small-block engine to the torque converter of an automatic transmission.

Flex plates are critical drivetrain components that transfer rotational power from the engine to the transmission while allowing for slight movement between components. In high-performance engines, flex plates must be strong enough to withstand high RPM and engine torque without deformation.

This flex plate is designed specifically for Chrysler LA-series 360 small-block engines, which require an externally balanced flex plate to maintain proper engine balance.

Because of its durable construction and SFI safety certification, this flex plate is commonly used in performance vehicles, muscle cars, and racing builds.

Compatible Engines and Transmissions

The Chrysler SB Steel SFI Flex Plate – LA 360 Small Block External Balance – 727 & 904 Compatible is designed for Chrysler engines and transmissions that require this specific flex plate configuration.

Typical compatible components include:

• Chrysler LA 360 small-block engines
• Chrysler 727 automatic transmissions
• Chrysler 904 automatic transmissions
• Mopar performance engine builds
• muscle car restoration projects

Because engine and transmission compatibility may vary depending on vehicle configuration, confirming fitment before installation is recommended.

Why External Balance Is Important

The Chrysler SB Steel SFI Flex Plate – LA 360 Small Block External Balance – 727 & 904 Compatible is designed for engines that require external balancing.

External balance means that part of the engine’s balancing weight is located outside the crankshaft. The flex plate must include the correct weight configuration so the engine operates smoothly.

Using the correct flex plate helps ensure:

• proper engine balance
• reduced engine vibration
• smooth drivetrain operation
• long-term engine reliability

For Chrysler LA 360 engines, an externally balanced flex plate is essential for proper engine function.

Build Quality and Materials

The Chrysler SB Steel SFI Flex Plate – LA 360 Small Block External Balance – 727 & 904 Compatible is constructed from high-strength steel designed to withstand demanding performance conditions.

Key construction features include:

• durable steel flex plate construction
• precision-machined mounting surfaces
• external balance weight configuration
• compatibility with Chrysler automatic transmissions
• SFI safety certification

SFI certification indicates that the component meets strict safety standards for high-performance and racing environments.

Why Performance Builders Use SFI Flex Plates

The Chrysler SB Steel SFI Flex Plate – LA 360 Small Block External Balance – 727 & 904 Compatible is commonly used in performance builds because SFI-approved components provide increased safety and durability.

Performance builders often choose SFI flex plates because they provide:

• improved structural strength
• increased safety at high RPM
• compatibility with racing regulations
• reliable power transfer

These advantages make SFI-approved flex plates a common upgrade in racing vehicles and high-performance engine builds.

Who This Flex Plate Is Designed For

The Chrysler SB Steel SFI Flex Plate – LA 360 Small Block External Balance – 727 & 904 Compatible is designed for buyers building or maintaining Chrysler small-block engines.

Typical buyers include:

• performance engine builders
• Mopar restoration specialists
• racing vehicle builders
• automotive performance shops
• mechanics working on Chrysler small-block engines

This flex plate is particularly suitable for engines producing significant horsepower where durable drivetrain components are required.

Product Specifications

The Chrysler SB Steel SFI Flex Plate – LA 360 Small Block External Balance – 727 & 904 Compatible is engineered for dependable performance in Chrysler engine builds.

Key specifications include:

• Engine Compatibility: Chrysler LA 360 small-block
• Balance Type: External balance
• Material: Steel construction
• Certification: SFI approved
• Transmission Compatibility: Chrysler 727 and 904 automatic transmissions
• Application: Performance engines and drivetrain builds

This flex plate integrates with compatible torque converters and automatic transmissions used in Chrysler vehicles.

Ordering and Installation Support

Ordering the Chrysler SB Steel SFI Flex Plate – LA 360 Small Block External Balance – 727 & 904 Compatible provides a reliable drivetrain component for performance engine builds.

Before purchasing a flex plate, it is recommended to confirm:

• engine balance type
• crankshaft bolt pattern
• transmission compatibility
• torque converter compatibility

Professional engine builders and drivetrain specialists can assist in confirming correct component compatibility.

With proper installation and compatible drivetrain components, a performance flex plate can provide reliable operation for many years.

Frequently Asked Questions

What does external balance mean on a Chrysler engine?

External balance means part of the engine’s balancing weight is located outside the crankshaft, requiring a flex plate with the correct balance weight.

What transmissions does this flex plate work with?

This flex plate is compatible with Chrysler 727 and 904 automatic transmissions.

What is SFI certification?

SFI certification means the component meets safety standards used in high-performance and racing applications.

Why do performance engines need stronger flex plates?

High-performance engines produce higher torque and RPM, requiring stronger flex plates to handle the increased stress.

What engines use the Chrysler LA 360 platform?

The Chrysler LA 360 engine is a small-block V8 used in various Mopar vehicles including Dodge and Plymouth performance models.

BluePrint SFI Flex plates
1971-1992 Chrysler, Dodge, Plymouth 360 Small Block with Torqueflite A727 and A904 Automatic Transmission, LA 360 External Balanced
Features and Benefits:
Ring Gear Tooth Quantity: N/A
Engine Balance:  External engine balance for pre magnum, AKA LA 360.
Flex plate Material: Steel
Safety Rating: SFI 29.1
Quantity: Sold Individually
Bolts Included: NO
Commonly purchased for BPC4085CT and BPC4082CT based engines.
Replacement for B&M 10236, but dual drilled for A904 pattern also, when used on a SB Chrysler.
Note: Chrysler torque converters have one offset bolt hole. Confirm you have all 4 bolt holes lined up before you begin tightening!
WARNING: Cancer and Reproductive Harm- www.P65Warnings.ca.gov