Holley Main Jets (2) - 73 RS004C04 Block mount

Block mount

Retains good throttle response and acceleration

Designed for street 289/302 c

1987-1991 Mercury Colony Park

1965-1974 Oldsmobile Delta 88

Holley Main Jets (2) - 73 RS004C04 Block mountSet 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