Hi guys just looking at parts for my build and i have found a good Jbs exhaust manifold.

Im just wondering if people have had any experience with them I've not really found anything on them. I was just going to run a k300 on a standard ported manifold but mine is now cracked so just looking at other options. Will be wanting to run 300 upwards so dont know what these jbs ones flow like.

Thanks in advance

Jack

Standard ported is best option

The jbs and 034 ones are poor

Standard ported is best option

The jbs and 034 ones are poor

 

Only poor, is this you being polite

 

What happened to the Relentless K03 manifold? Was suppose to flow well and need the ceramic coating to keep under bonnet heat down, not seen or heard anything of these for a while, not sure if they even still do them.