what about one of ians cvh custom inlet manifold and seeing as him and you old man are thick as thieves iam sure he would look after you
iam sure you know it would be good for 500bhp and you could save yourself alot of time and effort.
you could buy the jenvey which imo is the best on the market and it looks amazing too.
you could build something like ians inlet and incorporate the jenvey diffuser either 60mm or 70mm as they sell every part seperate for around £160 each





cheers paul