Holley Main Jets (2) - 58 931021 A stylish way to match

A stylish way to match the rest of the gauges in your interior and still keep track of time

5 to 1 Ratio

1965-1965 Oldsmobile 442

Rotationally Molded Polyethylene

optimized port and chamber design

Holley Main Jets (2) - 58 931021 A stylish way to matchSet of two carburetor main jets. Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors powered every NASCAR Cup team and nearly every NHRA Pro Stock champion for four decades. Now, Holley EFI products power these cars and are dominating the performance world. Holley products for GM's popular LS engine are dominating the LS scene as well. Holley's products also include performance fuel pumps, intake manifolds and