With our Holley Quick Change Kit, you can effortlessly swap out the secondary diaphragm spring without having to disturb the diaphragm itself. This means a smoother experience when you're making adjustments!

Designed with a balance tube, this kit is perfect for 2X4 barrel applications, ensuring compatibility and performance.

Important Downloads:

• Instructions for Part# 20-73

Features:

• Cover-Diaphragm Housing
• Quick Change Capability
• Streamlines the process of changing the vacuum spring.

Specifications:

• Color: Black
• Emission Code: 5
• Material: Plastic
• Product Type: Vacuum Secondary Cover
• Warranty: Limited 90 Day