Question: Do I need a restrictor?

Answer: There are two trains of thought on this and is your choice to add if you desire. It is designed to slow the flow of fluid through the heater core in order to make if more efficient. Some have found the restrictor will cause a noise in the heater coolant system.

There is also a thought that it will prevent excess pressure on the heater core however you will find there is also a bypass point internal to the belt tensioner. We have found the restrictor is not necessary and is another plastic part subjected to to heat over time will fail and cause a coolant loss at the most in opportune time. Bottom line we don't feel it is necessary but can be purchased at a local parts store if you believe it is required.

Question: Which year models do the connectors fit?

Answer: Any GM 3.8 Liter engine between the years of 1995 to 2002. This includes Chevrolet Camaro, Pontiac firebird, Pontiac Bonneville and as well as the Buick.

Question: What are the GM part numbers for our alternative design?

Answer:  #12570305  and #24504476.

Question: Do our connectors leak?

Answer: ... No. We have had 0 "Zero" Returns. The connectors are made to fit firmly inside the belt tensioner. The hose nipples are threaded inside the metal connector and wrapped with thread tape to ensure they don't leak.