Holley carburetor rebuild kit 37-935 Renew Kit — gasket and jet kit for Holley performance carbs, seals & tuning parts

The Holley 37-935 Renew Kit is a complete carburetor rebuild kit that replaces worn components for compatible Holley performance carburetors, restoring tuning range and reliable operation.

Whether you race on the weekend, maintain a vintage street car, or keep a high-performance crate engine in top shape, this genuine Holley kit gathers the small parts you need to rebuild and tune your carburetor without hunting for individual pieces. Holley has supplied performance fuel systems for over a century, and this kit reflects that experience by including factory-quality gaskets, seals, jets and extras designed for performance tuning and longevity.

What components are included and why do they matter?

The Renew Kit supplies the common wear items and tuning hardware used during a carburetor rebuild so you can refresh internal seals, metering circuits and adjustable parts. Replacing these parts eliminates leaks, restores predictable fuel metering and gives you extra pieces for performance adjustments.

• Gaskets and O-rings to stop vacuum and fuel leaks
• Replacement jets and metering parts for tuning
• Needles, seats and small hardware to restore flow control
• Parts tray packaging and a step-by-step instruction sheet

How will this kit improve my carburetor’s performance?

Fresh seals and calibrated metering parts reduce inconsistency caused by age and contamination. The kit’s included extra parts allow precise adjustments for different fuel or performance setups, helping the carburetor deliver steadier throttle response and better drivability.

• Replaces aged materials that cause leaks or poor idle
• Offers extra jets and parts for richer or leaner tuning
• Improves throttle response by restoring correct metering
• Includes a tuning guide to help make consistent changes

Is this kit compatible with my Holley carburetor and easy to install?

The 37-935 Renew Kit is made for Holley performance carburetors; check your carburetor model against Holley documentation to confirm fit. Installation is straightforward for anyone familiar with basic carburetor teardown, and Holley includes detailed instructions to guide first-time rebuilders through each step.

• Designed for use on Holley performance carburetors (verify model compatibility)
• Step-by-step instructions included for accurate reassembly
• Parts tray keeps components organized during rebuild
• Competitively priced compared with individual parts purchase

What should I expect after installing the Renew Kit?

After installing the kit, expect tighter seals, more consistent fuel delivery and a broader tuning window for performance adjustments. With factory-grade components, the carburetor should run cleaner and respond more predictably across idle, cruise and wide-open-throttle conditions.

• Reduced leaks and improved vacuum stability
• More predictable idle and midrange throttle response
• Extra tuning parts for fine adjustments by application
• Longer service life before the next rebuild is required

Who is this for: The Holley 37-935 Renew Kit is aimed at DIY mechanics, performance tuners and professional shops who service Holley performance carburetors. If you maintain a classic muscle car, race vehicle, or any engine running a Holley carb, this kit supplies genuine parts, a clear procedure, and the extra hardware you need to rebuild and tune the carburetor efficiently.