No. posted by Mal1ce on January 02, 2002 at 04:49 PM
Message
Supra guys have dealt with this for years. Basically the differences of the metals causes the welds to weaken when hot, however that is not enought to crack the manifolds. It is the vibrations and the stresses of the entire exhaust system that can cause a manifold to crack. Think about it... your exhaust is hanging on rubber hangers and when your boosting around your exhaust shakes and moves a lot. The exhaust is connected to the testpipes which are connected to the downpipes which are connected to the turbos (hey this could make a great song!). The stresses of all this can cause a manifold in a weakened condition (due to the heat) to crack. The Supra guys have found that you greatly reduce the chances of cracking a stainless steel manifold by adding a flex pipe in the exhaust which can flex and absorb all the shocks and vibrations of the exhaust system and help save your manifold.
