Drivetrain› Automatic Transmissions and Components

Sonnax

Line Pressure Booster Kit

$43.65

SKU: 6L80-LB1

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In Stock
Ships by Aug 5
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30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Sonnax 6L80-LB1 Line Pressure Booster Kit is engineered to enhance the performance of 6L45, 6L50, 6L80, and 6L90 automatic transmissions. The primary benefit of this upgrade is the achievement of shorter shifts and an increased torque capacity without introducing harshness at low speeds. This is accomplished through improved band and clutch holding, leading to a more responsive and durable transmission. For any questions regarding fitment or installation, contacting the manufacturer or a qualified technician is recommended.

MIA's Description

The Sonnax 6L80-LB1 is a line pressure booster kit designed for 6L45, 6L50, 6L80, and 6L90 transmissions. It includes a pressure regulator spring and a large ratio boost assembly. This kit aims to provide improved band and clutch holding.

Fitment

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Specifications

BrandSonnax
Part Number6L80-LB1
CategoryDrivetrain

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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