so i was on rrm earlier and saw a new product for oct was the 4g69 cylinder head flanges, i searched on here to see if anyone had wrote up a thread about it but i couldn't find anything so this may be a dumb question but what does this mean for us? what can a CHF do for our cars?

 

It gives people a starting point for fabricating a custom exhaust manifold.

 

that was quick well thank you for the info