Welcome Offer : Use Code WELCOME5 for 5% OFF!
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Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping Across USA
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping Across USA
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping Across USA
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping Across USA
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping Across USA
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping Across USA
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping Across USA
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping Across USA
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping Across USA
- No EU import duties. - Ships within 3-5 business days. (USA) - Ships with 8-12 business days. (International)
⚠️ California Proposition 65 Warning : Some products sold on this website may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information, visit www.P65Warnings.ca.gov.
Line Pressure Booster Kit4L60-E, 4L65-E, 4L70-Efits Early-Style Pump Early-Style Pumpvalvesleevepressure Regulator Springo-Rings (2)Line Pressure Booster Kit 4L60E-Lb1 Fits Early-Style Gm 4L60-E, 4L65-E And 4L70-E Pumps. Sonnax Hydraulic Line Pressure Booster Kits Contain Stronger Pressure Regulator Springs And Large Ratio Boost Valves Designed To Work Together To Provide Progressive Pressure Increases As Driving Conditions Become More Demanding.Our Pressure Regulator Springs Are Approximately 10 Stronger Than Oe And More Conservative In Impact Than Other Aftermarket Kit Springs. Large Ratio Boost Valves Provide Higher Pressure Incrementally And When It Is Needed The Most. The Combination Of These Springs And Valves In A Sonnax Kit 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.Achieve Shorter Shifts And Increased Torque Capacity Without Creating Low-Speed Harshnessimproved Band And Clutch Holding Capacity For Increased Durabilityprogressive Pressure Increase As Driving Conditions Become More Demandingall The Benefits Of Increased Line Pressure Without Overloading The Pump At Idlesimple And Affordable Drop-In Solution With No Special Tools Or Reaming Requirednote: Fits Early-Style Pump With Long 1.907' Sleeve Only. Use 4L60E-Lb2 For Later Pumps With Short, 1.810' Sleeve
Yes, we offer free standard shipping on all orders within the United States.
When will I receive my item?
Domestic orders typically arrive within 3-5 business days. Delivery times are estimated and may vary depending on your location, weather conditions, or other unforeseen factors.
Can I change or return my item?
We hope you love your purchase, but if you need to make a change or return your item, we’ve got you covered! You can initiate a return or exchange within 30 days of receiving your order. Please ensure the product is in its original condition and packaging. For more information on our return policy, please visit our Returns & Exchanges page.
Frequently Asked Questions
Q: What is the model number of this kit?A: The model number of this kit is six hundred ninety-eight million five hundred ninety-six thousand six hundred fifty-seven thousand four hundred three.
Q: What are the dimensions of the Sonnax Boost Valve and Spring Kit?A: The dimensions are four point eight inches in length, six point two inches in width, and one point four two inches in height.
Q: What type of vehicles is this kit compatible with?A: This kit is designed for early-style GM four L sixty E, four L sixty-five E, and four L seventy E pumps.
Q: How do I install the Sonnax Boost Valve and Spring Kit?A: Installation involves a simple drop-in process with no special tools or reaming required, making it user-friendly.
Q: Is this kit suitable for beginner mechanics?A: Yes, this kit is suitable for beginner mechanics due to its straightforward drop-in installation.
Q: How does the line pressure booster kit improve performance?A: The kit improves performance by providing a modest pressure increase at low end and higher pressure at high end, enhancing torque capacity.
Q: What is the spring strength compared to the original equipment?A: The pressure regulator springs in this kit are approximately ten percent stronger than original equipment springs.
Q: Can this kit be used with later-style pumps?A: No, this kit is specifically designed for early-style pumps with long sleeves and cannot be used with later-style pumps.
Q: How do I maintain the Sonnax Boost Valve and Spring Kit?A: Maintenance involves regular checks for any signs of wear or damage, but generally, the kit is designed for long-term use without special care.
Q: What should I do if the kit arrives damaged?A: If the kit arrives damaged, you should contact customer support immediately for a replacement or refund.
Q: Is there a warranty for the Sonnax Boost Valve and Spring Kit?A: Yes, the kit typically comes with a manufacturer's warranty, which covers defects in materials and workmanship.
Q: How does this kit affect driving conditions?A: The kit provides a progressive pressure increase, enhancing performance as driving conditions become more demanding.
Q: Can this kit cause low-speed harshness?A: No, the kit is designed to achieve shorter shifts and increased torque capacity without creating low-speed harshness.
Q: What components are included in the kit?A: The kit includes a valve, sleeve, pressure regulator spring, and two O-rings.
Q: Is this kit easy to remove once installed?A: Yes, the kit can be easily removed if necessary, as it is designed for straightforward installation and removal.
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