Looking for the best fit components for your Chevy 383 or 400 external balanced engine? We offer durable, easy-to-install upgrades designed to boost performance and reliability for smooth, long-lasting operation.
Upgrading your Chevy 383 or 400 engine starts with the right parts. External balanced components ensure smooth performance. We’ve got the best fit options for you.
These parts are easy to install and built to last. Whether you’re racing or cruising, they deliver reliable results. Let’s explore the perfect upgrades for your engine.
List of Top 3 Fit For Chevy 383 400 External Balanced
| Image | Title | Best For | Price |
|---|---|---|---|
![]() |
Automatic Transmission 168 tooth Flexplate+ HP bolts compatible with Chevy 383 400 External Balanced (Flywheel + Bolts) |
This Automatic Transmission Flexplate is perfect for Chevy owners with a 383 or 400 engine. It’s ideal for those needing a reliable replacement with 168-tooth ring gear and external balance. |
|
![]() |
PRW 1840000 SFI-Rated External Balance 168 Teeth Chromoly Steel Flexplate for Chevy 400/383 1970-80 Early |
This PRW 1840000 Flexplate is perfect for racers who need a strong and reliable part for their Chevy 400/383 engine. It’s built tough to handle high RPMs and engine stress, making it ideal for racing. |
|
![]() |
PRW 1640081 SFI-Rated 33 lbs. 168 Teeth External Balance Billet Steel Flywheel for Chevy SB 383-400 1970-85 |
This PRW 1640081 flywheel is perfect for car enthusiasts who want a reliable and high-performance upgrade for their Chevy SB 383-400 engine. It’s ideal for those seeking precision and safety, with its SFI certification and CNC machined design. |
Detailed Reviews
Discover the perfect upgrade for your Chevy 383 or 400 engine. We’ve analyzed top options for smooth performance and lasting durability. Find the ideal flexplate or flywheel that fits your needs. Let’s explore the best choices for your build.
1. Automatic Transmission 168 tooth Flexplate+ HP bolts compatible with Chevy 383 400 External Balanced (Flywheel + Bolts)

This automatic transmission flexplate is a perfect fit for your Chevy 383 or 400 engine. It features a 168-tooth ring gear and is externally balanced for smooth operation.
The flexplate comes with high-performance bolts and has a 2-piece rear main seal style. It’s designed to replace OEM part 343738, making it a reliable upgrade for your vehicle.
Easy to install, durable, and high-quality. This flexplate is a great choice for your engine.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This Automatic Transmission Flexplate is perfect for Chevy owners with a 383 or 400 engine. It’s ideal for those needing a reliable replacement with 168-tooth ring gear and external balance.
Ready to Purchase?
2. PRW 1840000 SFI-Rated External Balance 168 Teeth Chromoly Steel Flexplate for Chevy 400/383 1970-80 Early

The PRW 1840000 Flexplate is a high-performance upgrade for your Chevy engine. It’s SFI 29.1 certified, ensuring safety and reliability. This flexplate is built tough for racing demands.
It’s 0.035 inches thicker than stock, offering extra strength. The double-welded ring gears handle high RPM and stress from engine torque. Perfect for high stall converters.
This flexplate is designed for racing and exceeds OEM specs. It fits Chevy 400/383 engines from 1970-80. Upgrade your ride with PRW’s trusted quality.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This PRW 1840000 Flexplate is perfect for racers who need a strong and reliable part for their Chevy 400/383 engine. It’s built tough to handle high RPMs and engine stress, making it ideal for racing.
Ready to Purchase?
3. PRW 1640081 SFI-Rated 33 lbs. 168 Teeth External Balance Billet Steel Flywheel for Chevy SB 383-400 1970-85

The PRW 1640081 is a high-quality flywheel for Chevy SB engines. It’s SFI certified for safety and performance. This flywheel is made from 1045 billet steel, ensuring durability.
It fits multiple clutch patterns, making it versatile. The design is CAD engineered for precision. It’s CNC machined to meet strict standards.
This flywheel is externally balanced for smooth operation. Its 33 lbs. weight and 168 teeth are perfect for Chevy SB 383-400 engines from 1970-85. It’s a reliable upgrade for your vehicle.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This PRW 1640081 flywheel is perfect for car enthusiasts who want a reliable and high-performance upgrade for their Chevy SB 383-400 engine. It’s ideal for those seeking precision and safety, with its SFI certification and CNC machined design.
Ready to Purchase?
Buying Guide
Upgrading your Chevy 383 or 400 engine starts with the right parts. External balanced components ensure smooth performance. We’ve got the best fit options for you.
Choosing the right parts for your Chevy 383 or 400 engine is easy with our guide. We’ll help you find reliable upgrades that fit perfectly. Let’s make your engine run smoother and stronger.
Factors to consider when buying:
- Compatibility: Ensure the part fits your Chevy 383 or 400 engine. Check the year and model for a perfect match.
- Material Quality: Look for durable materials like chromoly steel or billet steel. They last longer and handle stress better.
- Balance Type: Choose external balanced parts for smooth engine operation. It’s key for performance.
- Certification: Opt for SFI-rated parts if you’re racing. They meet safety standards and handle high RPM.
- Installation: Pick parts that are easy to install. Save time and effort with user-friendly designs.
- Performance Needs: Decide if you need parts for racing or daily driving. High-performance options differ from standard upgrades.