Product Description
Sonnax 4L80E/4L85E Boost Valve
And Pressure Spring Upgrade 4L80E-LB1
Our Part# S-4L80E-LB1
•Large Ratio Boost Assembly
•Pressure Regulator Spring
•O-Rings (2)
Get a Boost with Sonnax Line Pressure Booster Kits
Affordable Kit for Big Performance without a Big Price Tag
The larger boost valves and stronger PR springs in Sonnax booster kits raise line pressure the SMART way by controlling pressure increase progressively with the demand of driving conditions.
•Simple, affordable parts require no special tools or reaming to install.
•Slightly stronger springs provide a modest base line pressure increase. Unlike other, stronger aftermarket springs, Sonnax springs won't overload the pump at idle.
•Larger boost valves deliver demand-based line rise without low-speed harshness.
How Progressive Boost Works:
The combination of Sonnax booster kit valves and springs gives you the best of both worlds: a modest pressure increase at the low end, with a high-end pressure that is equal to or greater than that of other aftermarket kit springs.
The combination of boost valves and springs is the ONLY way to progressively increase line pressure.
We have been in the transmission industry for over 20 plus years. I'm proud to say I'm a 2nd generation transmission re-builder and transmission tech. I do not sell any product that I would not use on my own rebuilds.
RETURNS: If you have any reason for return please contact us 1st before opening a return claim.
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