Holley Vacuum Secondary Diaphragm - Carburetor Model Numbers R2929/R3116/R3259-1/R3300/R3410/R3977/R4118/R4201/R6127/R80512 93511 55 X 570 X 790The

55 X 570 X 790The COMP Cams philosophy has never changed: make the highest performing products possible and lead the industry in technological development

1969-1969 Chevrolet Camaro

Lifter Valley Standpipe

067 in Main Hole

CRF Technology which helps provide up to a 4 dbA sound reduction

Holley Vacuum Secondary Diaphragm - Carburetor Model Numbers R2929/R3116/R3259-1/R3300/R3410/R3977/R4118/R4201/R6127/R80512 93511 55 X 570 X 790TheHolley Vacuum Secondary Diaphragm 135 3 Carburetor Model Numbers R2929 R3116 R3259 1 R3300 R3410 R3977 R4118 R4201 R6127 R80512 Vacuum Secondary Diaphragm 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