Exterior Components› Body Panels and Components
Sun Coast Converters
Suncoast Converters Boost Valve Kit - Early Style .470 Dia. O-ring Style 77898E-4K
SKU: S02K 77898E-4K
Moderate — 2–4 hours
Description
MIA's Description
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
| Brand | Sun Coast Converters |
| Part Number | S02K 77898E-4K |
Videos
4L60E Rebuild Part 4 - Installing the Sonnax Performance Pack and Super Hold Servos
Sonnax 4L60E transmission line pressure boost valve
Sonnax SmartShell® - 4L60 Series Heavy Duty Reaction Shell Kit
Clean Up Your Shifts with Sonnax Line Pressure Booster Kits
Your Guide to a Sonnax 4L60/E High Horsepower Level 3 Transmission Build
INSTALL 77701-076 sonnax 4l60e Servo Release Check Valve Kit
Talk about getting the works!!! SONNAX billet parts and what’s good for you part 2
Animal Performance Sonnax 700R4/4L60E Smart shell demo
Sonnax Vacuum Testing 4L60E Valve Body PT2 - Valve Body Repair
4L60E Valve body build Sonnax Performance Pack 1of 2
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