The VRS-4150 line of race and performance carburetors is the most versatile and feature-rich, out-of-the-box carburetor available on the market today. The VRS-4150 Calibration Kit provides enthusiasts, racers, and carb tuners with everything needed to fine-tune any VRS gas carburetor for optimal performance.

With over 130 precision-machined parts, this kit provides all the necessary components to ensure a finely tuned engine, offering optimal performance both on and off track. The key components included are:

  • 4 of each even-numbered main fuel jets rranging from size 62 to 78, giving users the ability to make global fuel curve changes.
  • 2 of each 4-window power valves with 5.5 Hg, 6.5 Hg, and 7.5 Hg ratings to adjust power enrichment points.
  • 44 6-32 jets in sets of four allow adjustments to the idle, intermediate, and power enrichment circuits on the metering blocks.
  • 40 10-32 air bleed jets in sets of four. Allowing for quick and easy fine-tuning of the main, intermediate, and idle circuits from the top of the carburetor.
  • .033, .035, and .040 squirters, to tune the duration of the acceleration pump shot.

All jets are manufactured in the USA using high-quality, precision-machined brass to ensure durability and accurate sizing. By providing the most commonly needed jets, bleeds, and power valves in one convenient package, Edelbrock gives customers the components they need to fine-tune their VRS Carburetors with ease and accuracy.