Exterior Components› Body Panels and Components

Sun Coast Converters

Suncoast Converters Line Pressure Booster Kit - Early Style 4L60E-LB1

$54.20

SKU: S02K 4L60E-LB1

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $100
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

Suncoast Converters Line Pressure Booster Kit - Early Style 4L60E-LB1

MIA's Description

The Sun Coast Converters 4L60E-LB1 is a line pressure booster kit designed for early-style GM 4L60-E, 4L65-E, and 4L70-E transmission pumps. This kit includes a stronger pressure regulator spring and a large ratio boost valve to progressively increase line pressure as driving conditions demand more. It aims to achieve shorter shifts and increased torque capacity without causing low-speed harshness.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandSun Coast Converters
Part NumberS02K 4L60E-LB1

Videos

Clean Up Your Shifts with Sonnax Line Pressure Booster Kits

Clean Up Your Shifts with Sonnax Line Pressure Booster Kits
Sonnax 4L60E transmission line pressure boost valve

Sonnax 4L60E transmission line pressure boost valve
INSTALLING SONNAX LINE TO LUBE VALVE IN 4L80E!!! -a21bravo

INSTALLING SONNAX LINE TO LUBE VALVE IN 4L80E!!! -a21bravo
4L60E Rebuild Part 4 - Installing the Sonnax Performance Pack and Super Hold Servos

4L60E Rebuild Part 4 - Installing the Sonnax Performance Pack and Super Hold Servos
EBAY Dodge Sonnax Line Pressure Booster 45RFE

EBAY Dodge Sonnax Line Pressure Booster 45RFE
Your Guide to a Sonnax 4L60/E High Horsepower Level 3 Transmission Build

Your Guide to a Sonnax 4L60/E High Horsepower Level 3 Transmission Build
Revolutionary Sonnax 4L60/E Transmission Upgrades at SEMA 2018

Revolutionary Sonnax 4L60/E Transmission Upgrades at SEMA 2018
INSTALL 77701-076 sonnax 4l60e Servo Release Check Valve Kit

INSTALL 77701-076 sonnax 4l60e Servo Release Check Valve Kit
Sonnax Zip Kits®

Sonnax Zip Kits®
Sonnax GM 6L80 Series Transmission Upgrades & Repairs

Sonnax GM 6L80 Series Transmission Upgrades & Repairs

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.

View Full Return Policy