please help with my exaust manifold

[632 Regal]

sure you want to do this? make sure to port match them and not go bigger if you do. NO grinding in the valve pocket or you will kill performance. This aint no Chebby!

widening the exhaust ports

[chris_e34]

sure you want to do this? make sure to port match them and not go bigger if you do. NO grinding in the valve pocket or you will kill performance. This aint no Chebby!

i am still debating doing this. i have researched it extensivly and from what i understand, a dinan free flow exaust kit or equivelent might be a better idea. the performance gains are not on par with the work involved in the widening job..... i think im goign to start another thread