Zip Corvette sales and customer service representatives are here to serve you during the following hours:
Mon-Fri. 8:00am-5:00pm
Sat-Sun: Closed
(Eastern Standard Time)
Zip’s showroom will be unavailable for walk-in shopping or order pickup. Local customers are encouraged to call us at 1.800.962.9632 to place an order with your favorite Zip salesperson. All customers can continue to shop securely online 24/7 at zip-corvette.com. Orders are shipping as usual. All in-stock parts ship same-day when your order is placed by 3pm ET Monday-Friday.
Other questions? Contact us here 24 hours a day 7 days a week.
New replacement 1976-1980 Corvette intake manifold EGR vacuum fitting - thermal vacuum valve or ported vacuum switch. Temperature sensitive switch threads into intake manifold or thermostat housing and controls vacuum to the EGR valve. Often found broken or cracked due to the plastic housing, loss of vacuum control could cause surging, rough idle or engine knocking. 3/8" - 18 thread - 2 vacuum ports.