The Stovebolt Site Forums The Shop Area Engine Shop 250 Split Exhaust Manifold?

Are there any companies that will split the exhaust manifold for a 250? If not, has anyone seen instructions on how to do the job? I searched the forum and only saw mention that Kansas Kustoms would no longer do them because of high failure rate.

Instead of a split manifold, I went with headers. The set I got (Hedman) are split front-to-rear by design.

The stock exhaust manifold and headpipe is so restrictive that it seems to me that the only benefit from splitting the manifold is to allow a true dual exhaust to be fitted and change the exhaust sound somewhat. I know this is an old rodder's trick, but I don't believe it to be very effective for adding power. Some, yeah...but not nearly what you'd get with headers.

This is just my own opinion and based on my own experience...others may not agree.

I had an original manifold that had been split probably years ago. It was cracking where the "new" elbow was added, so I took it to a good welding shop, and they pointed out to me that the spilt was never completed by putting a little divider into the manifold to separate the flow 3 and 3 (all the cylinders just dumped into one big space that had two outlets). They beefed up the welding around the add-on elbow, and put in a little piece of metal to split the flow evenly. Bottom line is: find a good welding shop with an old-timer (or younger guy, but usually it's an old-timer) who knows how to weld cast iron. It's an art, from what I understand. Can't say it added a lot of power (or any at all), but it sure sounds good.