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Holley is the legendary American carburetor and fuel-injection brand — over 100 years of induction history. From the iconic 4150 four-barrel to today's Sniper EFI conversions, Holley remains the choice for muscle car restorations, Pro Mod, and gasser builds.
The Holley Vacuum Secondary Spring Kit is the ultimate tool for tuners looking to optimize the secondary opening rate of their Holley 4150, 4160, or 4500 series carburetors. By adjusting how quickly your secondary butterflies open, you can eliminate engine bog and maximize acceleration based on your specific engine build, camshaft profile, and vehicle weight.
Tuning vacuum secondaries is one of the most effective ways to improve throttle response and overall driveability. A lighter spring allows for earlier opening, while a stiffer spring delays it, helping to prevent hesitation on engines with lower vacuum signals. This kit provides you with the flexibility to test and find the exact spring that matches your vehicle's unique power curve. Don't settle for out-of-the-box performance when you can customize your carburetor to perfection. Elevate your engine's potential with quality components from GGCRACING.
Other popular Holley products customers consider together:
Holley is the legendary American carburetor and fuel-injection brand — over 100 years of induction history. From the iconic 4150 four-barrel to today's Sniper EFI conversions, Holley remains the choice for muscle car restorations, Pro Mod, and gasser builds.
The Holley Vacuum Secondary Spring Kit is the ultimate tool for tuners looking to optimize the secondary opening rate of their Holley 4150, 4160, or 4500 series carburetors. By adjusting how quickly your secondary butterflies open, you can eliminate engine bog and maximize acceleration based on your specific engine build, camshaft profile, and vehicle weight.
Tuning vacuum secondaries is one of the most effective ways to improve throttle response and overall driveability. A lighter spring allows for earlier opening, while a stiffer spring delays it, helping to prevent hesitation on engines with lower vacuum signals. This kit provides you with the flexibility to test and find the exact spring that matches your vehicle's unique power curve. Don't settle for out-of-the-box performance when you can customize your carburetor to perfection. Elevate your engine's potential with quality components from GGCRACING.
Other popular Holley products customers consider together:
