Our vacuum blocks are produced with pride in the USA. Replaces GM part number # 25525671. They are available in a Smooth or a Grooved finish to match the upper factory plenum. The stock billet 86-87 replacement vacuum block and includes the gasket. Installation hardware is not included. This particular version is for restoration. You re-use you old screws. This way it looks like your factory vacuum block but with no more plastic that leaks. All ports are loctite to prevent any leaks. Powder coated the correct Satin Black.
The reason our vehicles run rough is due to vacuum leaks. The vacuum block seems to be the weakest point. The factory plastic unit gets crushed down over time from trying to tighten it so it stops leaking. You see the dip in the top. You have changed the gaskets but oil still seeps out. Our new Vacuum blocks can handle the heat & oil that are traveling thru the part. This will be the last unit you ever buy.This is a one time do it & never worry about it deal.
All vacuum blocks are tightened with Loc-tite before shipping. This way they will not leak air thru the threaded ends like the others that are manufactured.
Our Vacuum blocks are built with the highest of quality control right here in Connersville, Indiana. Take Notice how all of the ports are the same as the factory size. Also notice how the port flows are the same as the factory un like the generic blocks. Installed a new vacuum block & having an idle problem Compare it to the original.