the bus started making a bad exhaust leak noise a couple months ago we checked and tightened them up. still had a noise the headers were wrapped and also used to break in the engine, we couldn't see the cracks finally decided to replace them with vette manifolds found this when we unwrapped them looks like they got hot.
an engine break in + almost 12k miles I got my $50 worth out em installing the manifolds now kinda getting excited about driving down the road without my head hanging out the window hard to believe those thing were perfect less than a year ago
Wrap traps moisture against the tubes. Dirt guys found that out real quick when it first came out. Wash the car, trap the moisture, buy big buck headers again in the same season you put them on. Might be fine in a place without moisture. SPark
I can understand headers rusting. But those look like they were crushed. Like ya bend something back and forth to break it in half.
they were used to break in the engine those things we glowing orange from B-ham Al to half way across Georgia they had a slip on collector, it kept slipping back and dropping down a couple of times its also in a 6500 pound bus, those things get hot
I had headers wrapped once. The long front tubes collapsed in on themselves like they were smashed. Number one cylinder tube almost totally choked off. Took close to ten years and 50k miles though.
The Jalopy Journal
