The Benefits of Progressive Pressure
Sonnax Booster Kit
= Responsive, Variable (Progressive) Increase
Other Aftermarket Kits
= Unresponsive, Steady (Linear) Increase
For an in-depth look at raising line pressure, read The Prescription for Optimum Pressure.
See what people are saying about Line Pressure Booster Kits:
We used the 4T65E-LB1 in several applications...it doesn't give harsh shifts, just a little something extra. Very nice product and I highly recommend it."
Pine Bluff, AZ
Use the Sonnax 4L60E-LB1 progressive boost valve...it will put a smile on your customer's face."
Dan's Service Center
I just received my line pressure booster for my 2012 Ram and wow! The CPU gets the new pressure signal very fast...30 seconds of slow-medium driving...and when I floor it....yihaaa! It shifts aggressively and I can feel the tranny grab the clutches with more power when it changes gear...great product! Thumbs up!!!"
Senneterre, Québec, Canada