Cutting exhaust header flange at the block??

[badmix]

I head about cutting the flange between exhaust ports on headers to make them seal better, since headers are known to warp easily. Anyone do this with positive results??

 

[ryoken]

if they have sh*tty flanges from the beginning, sure.. heck, my stock exhaust manifolds have the cut... nice 3/8" flange headers, not needed...

 

[sweetk30]

real headers dont need this.

older and or cheepo ones warp bad from to thin a flange.

 

[wheeler]

Agreed, I had to cut a cheap set of "jegs" headers on my old small block to he the gaskets to seal. Although it also made it easier to install and remove.

 

[badmix]

I just cut 'em. going to sand them down and get some exhaust paint on them and check into those "soft seal" gaskets I was reading about. I also "smoothed" up the part of the header that actually touches the head, it was a lil rough. Hope to get them back on sometime this week. lol.

These were cheap hookers or heddman headers, I like them though as they fit well between frame and motor and I just put the "ball/socket" collector on them. So just trying to get as much mileage out of them as I can.

 

[ryoken]

if your concerned about that surface, you should drag a flat file over em and mill em by hand as needed... i do it at work all the time...

 

[badmix]

if your concerned about that surface, you should drag a flat file over em and mill em by hand as needed... i do it at work all the time...

Thanks, Ill do that before I paint them.