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Believe It Performance Valve Springs And Retainer Kit Smart Choice [T3MIzPlC]

$54.99 $175.99 -69%

Ultimate Upgrade for Duramax Performance The XDP Believe It Performance Valve Springs And Retainer Kit Smart Choice [T3MIzPlC] XD386 is a game-changer for your modified 2001-2016 GM 6.6L Duramax. This kit is designed to provide the ultimate upgrade for engines that have undergone cams

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Believe It Performance Valve Springs And Retainer Kit Smart Choice [T3MIzPlC]

Ultimate Upgrade for Duramax Performance

The XDP Believe It Performance Valve Springs And Retainer Kit Smart Choice [T3MIzPlC] XD386 is a game-changer for your modified 2001-2016 GM 6.6L Duramax. This kit is designed to provide the ultimate upgrade for engines that have undergone camshaft upgrades and other modifications that increase boost levels. With enhanced valve control, this kit ensures that your engine performs at its peak, delivering the power and efficiency you demand. Key features include a conical spring design for better control and lighter retainers, as well as a complete set of valve springs, retainers, and locks.

Advanced Design and Specifications

The XDP Performance Valve Spring Kit XD386 boasts a conical spring design that offers superior valve control compared to standard straight springs. This innovative design also allows for smaller and lighter retainers, which contribute to a more efficient and balanced engine operation. Each spring undergoes a stress relief process and is computer load mapped to ensure quality and long-term reliability. The kit includes a complete set of components, with each spring matched within 1 lb of seat pressure for consistency. Notable specifications include an installed height of 1.610 inches, an installed pressure of 125 lbs, and a coil bind of 1.050 inches.

Performance Enhancement for Everyday Use

Whether you're driving through the city streets or tackling off-road trails, the XDP Believe It Performance Valve Springs And Retainer Kit Smart Choice [T3MIzPlC] XD386 is an essential upgrade for your Duramax. This kit is perfect for drivers who demand peak performance and reliability, and it's especially beneficial for those who have increased boost levels through modifications. With its complete set of components and 1-year unlimited mileage warranty, this kit offers peace of mind and a boost in power and efficiency. Benefits include improved valve control, lighter retainers, and a more responsive engine, making it an ideal choice for any Duramax owner looking to enhance their vehicle's performance.

What Our Customers Say

February 7, 2026

Absolutely no complaints!

An excellent buy. I have absolutely zero regrets.

- Armando X..

February 7, 2026

Absolutely no complaints!

This is a really great and a very useful tool.

- Maggie L..

February 7, 2026

Absolutely no complaints!

4-66. An outstanding item that I use each and every day.

- Jaxson L..

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