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6L90 Transmission Performance Parts

Circle D 6L90 transmission performance parts and rebuild kits are some of our most popular products. Our customers know that when they want to make 6L90 transmission upgrades, Circle D is their go-to source. We have a passion for what we do and we don’t sell any parts that we wouldn’t put in our own cars. This dedication to quality is why so many Houston-area car enthusiasts use Circle D for their transmission rebuilds.

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6L90 Performance Transmission Rebuild Kit - CDT Level 2

Rated up to 600 RWHP, HP ratings are contingent on numerous factors, such as tune, vehicle weight, power adder, use, etc. | Detailed Instructions Included | FREE UPS Domestic Ground Shipping
$1,525.00

6L90 Performance Transmission Rebuild Kit - CDT Level 3

Rated up to 750 RWHP, HP ratings are contingent on numerous factors, such as tune, vehicle weight, power adder, use, etc. | Detailed Instructions Included | FREE UPS Domestic Ground Shipping | WE WILL BE TEMPORARILY SUBSTITUTING BORG WARNER 2-6 CLUTCHES AND THE ONLY OPTION AVAILABLE FOR THE BILLET INTERMEDIATE SHAFT IS THE TWO-PIECE.
$2,495.00

6L90 Performance Transmission Rebuild Kit - CDT Level 4

10/18/21: OUT OF STOCK. Rated up to 1100 RWHP, HP ratings are contingent on numerous factors, such as tune, vehicle weight, power adder, use, etc. | Detailed Instructions Included | FREE UPS Domestic Ground Shipping | NO core required for output carrier | WE WILL BE TEMPORARILY SUBSTITUTING BORG WARNER 2-6 CLUTCHES.
$3,490.00

6L90 Performance Transmission Complete Clutch Module - Level 3 & 4

**OUT OF STOCK** Includes all 5 Clutch Kits | FREE UPS Domestic Ground Shipping | WE WILL BE TEMPORARILY SUBSTITUTING BORG WARNER 2-6 CLUTCHES.
$1,075.00

6L90 (One-Piece) Performance Transmission Billet Shaft, Hub & 4-5-6 Clutch Kit

8/10/21: Currently on backorder - place your order now - it will be filled as soon as the part is available on a first-come, first-served basis. Rated up to 1100 RWHP | Detailed Instructions Included | FREE UPS Domestic Ground Shipping
$1,195.00

6L90 (Two-Piece) Performance Transmission Billet Shaft, Hub & 4-5-6 Clutch Kit -

**OUT OF STOCK** Rated up to 1100 RWHP | Detailed Instructions Included | FREE UPS Domestic Ground Shipping
$1,195.00

6L90 (One-Piece) 4-5-6 Billet Shaft & Hub for use with Powerglide-style, 45-tooth frictions, Level 3 or 4

8/27/21: Currently on backorder - place your order now - it will be filled as soon as the part is available on a first-come, first-served basis. Rated up to 1100 RWHP | Detailed Instructions Included | FREE UPS Domestic Ground Shipping
$895.00

6L90 (Two-Piece) Performance Transmission Billet Shaft & Hub, Level 3

Rated up to 750 RWHP | Detailed Instructions Included | FREE UPS Domestic Ground Shipping
$895.00

6L90 Performance Transmission 4-5-6 Clutch Kit, Level 3 or 4

**OUT OF STOCK** Rated up to 1100 RWHP | Detailed Instructions Included | FREE UPS Domestic Ground Shipping
$400.00

6L90 Performance Transmission, 3-5-R Clutch Kit

Rated up to 1100 RWHP | Detailed Instructions Included | FREE UPS Domestic Ground Shipping
$425.00

6L90 Performance Transmission 4140 HTSR Billet Reinforced Output Carrier (Billet Planetary)

Drop in Part for Vehicles producing over 750 RWHP* | FREE UPS Domestic Ground Shipping | NO core required
$995.00

Sonnax Pressure Switch Installation Tool Kit

Product requires the purchase of a Kit, Clutch Module or BROC.
$34.95

STL010 6L80/90 2014 & Up Sure-Cool System

Product requires the purchase of a Kit, Clutch Module or BROC.
$55.00