Holley Main Jets (2) - 77 Helmet Shield 375 in Bolt Holes

375 in Bolt Holes

Fits major brand oil pumps

This Electric Pressure Control Valve Kit is for a discharge/refill of 35-40 PSI

1975-1979 Chevrolet K5 Blazer

Adjustable button height sets with a custom lock nut

Holley Main Jets (2) - 77 Helmet Shield 375 in Bolt HolesSet 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