This gasket was developed to solve a problem customers where having with installation of the long tube headers on the 1GR-FE 4.0L V6 Toyota truck engine.
The flange and gasket recess size is different from the stock manifold and Y pipe and it is difficult to get a good seal and prevent the gasket from blowing out. After a few years of testing different solutions URD developed this gasket to solve the problem.
If you are installing Long Tube Headers or an aftermarket Y pipe on the 4.0L V6 you will need TWO of these gaskets.
If you use new or reuse stock type gaskets they will likely fail in a short period of time.
Note- If you purchase the Long Tube Headers or Y pipe from URD you have the option to purchase this gasket with headers or Y pipe at a significant discount. The URD Gasket may vary in appearance from the picture.
B.Carter (verified owner) –
Seems to work better than the DT supplied gaskets. Very thick and robust, don’t see them blowing out easily. Wasn’t happy about the shipping cost. Which, for some reason was about x2 the price of what the flat rate box costs that it was shipped in.