I bought Sierra exhust manifolds last august from BFonly to find my 1990 454 engine siezed, so they remainsd in the box till two weeks ago when I had my mechanic install them on another engine. One exhast manifold got hot, upon inspection found the manifold is blocked,had to be a bad batch, anyone else have that problem. will call BF tomorrow.
problems :sierra exhaust manifolds
- Thread starter jbrad
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