Circle D - M 245mm Pro Series PG/350/400 Torque Converter
Circle D - M 245mm Pro Series PG/350/400 Torque Converter - Image 2
Circle D - M 245mm Pro Series PG/350/400 Torque Converter - Image 3

Circle D – M 245mm Pro Series PG/350/400 Torque Converter

(1 customer review)

$999.00

-

Circle D
  • CNC-machined billet steel drive cover
  • Screw-on pilot (universal bolt pattern option) allows adjustability for use with early GM pilot length as well as LS / Gen-V LT pilot length
  • Multiple bolt patterns available
  • 2,800 – 5,000+ RPM stall speed options
  • Fully furnace brazed impeller & turbine assemblies
  • TIG welding reinforcement of impeller & turbine fins in high stress areas
  • Roller bearings on both sides of the stator
  • Custom HD deep groove ball bearing turbine support
  • Billet steel pump hub
  • Billet steel turbine hub
  • Anti-ballooning plate

(Most converters are built-to-order; current lead time is around 3-4 weeks)

Ships directly from supplier

This item ships directly from the manufacturer. If your order is urgent, please reach out to determine the specific lead time.

245mm Stall Options *

Sprag Options *

Input Shaft Spline Count *

Bolt Pattern *

Purchase now and earn 999 Reward Points.

Learn More about GPI Reward Program

 
Category: Brand:
Description

GM 245mm Pro Series PG/350/400 Torque Converter

The GM 245mm Pro Series PG/350/400 Torque Converter by Circle D Specialties is a premium choice for those looking to optimize performance in street, street/strip, and sportsman drag racing applications. Designed for use with Powerglide, TH350, or TH400 transmissions, this torque converter is highly versatile, making it suitable for engines ranging from 300 to over 800 horsepower. With advanced engineering and a variety of customizable options, it ensures durability, adaptability, and exceptional performance under demanding conditions.

  • Core Features:
    • CNC-machined billet steel drive cover for maximum strength and precision.
    • Screw-on pilot with universal bolt pattern for compatibility with early GM and LS/Gen-V LT pilot lengths.
    • Multiple bolt patterns available for flexibility in various setups.
  • Performance Benefits:
    • Wide stall speed range (2,800 – 5,000+ RPM) to suit different performance needs.
    • Fully furnace brazed impeller and turbine assemblies for enhanced durability.
    • TIG-welded reinforcement in high-stress areas to withstand intense applications.
    • Roller bearings on both sides of the stator for smooth operation.
    • Anti-ballooning plate to maintain integrity under extreme pressure.
  • Customization Options:
    • Stock and custom sprag options available.
    • Input shaft spline count: 30-spline for Powerglide, TH350, and TH400 transmissions.
    • Universal bolt pattern support: 3×10.75, 3×11.06, and 3×11.50.
    • Optional billet flexplate for LS or Gen-V LT engines (6 or 8 bolt crank flange).
  • Build Specifications:
    • Billet steel pump hub and turbine hub for unmatched reliability.
    • Custom heavy-duty deep groove ball bearing turbine support.

Note: Custom converters have a lead time of 2-3 weeks.

Reviews (1)

1 review for Circle D – M 245mm Pro Series PG/350/400 Torque Converter

5.0
Based on 1 review
5 star
100
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%
1-1 of 1 review
  1. Avatar photo
    Damoncus Shaw
    Verified owner

    Very pleased with product waiting for installation.

    (0) (0)
Add a review
You must be logged in to post a review Log In
Questions & Answers (3)

Customer questions & answers

    6.0 LS 80/88mm T6 turbo need one that will take over 800/900 wheel power
  1. Q 6.0 LS 80/88mm T6 turbo need one that will take over 800/900 wheel power answer now
    Asked by Stanley Robinson on April 19, 2026 7:58 pm
    A I would contact Brady at Circle D and get his recommendation
    2. Is it good for transbrake?
  2. Q Is it good for transbrake? answer now
    Asked by Eli Fleming on March 8, 2026 4:34 pm
    A I would reach out to Circle D directly and ask them what converter would be best for your application
    3. Hello, I’m building a 3rd gen Camaro with a 6.0 lq9. It will have a Btr stage 3 turbo cam with a single 7675 precision turbo. I am building a street strip car. I was wondering what converter I should get. It will have a 4l80e. It has 3.42 rear gears. Thanks, Kevin
  3. Q Hello, I’m building a 3rd gen Camaro with a 6.0 lq9. It will have a Btr stage 3 turbo cam with a ...... Read more
    Asked by Kevin Rose on May 13, 2025 10:03 am
    There are no answers for this question yet. Answer now

Vehicle Application

Vehicle Application

SHARE YOUR CART