Janspeed Manifold

mcjimny wrote: KAP list a full competition exhaust inc fanimold for £625iirc. I've no idea if its stainless though or road legal.

There was an article in a mag i read a few months ago where they went to Janspeed and they knocked up a system from scratch for some retro car. They are quite open to one offs apparently, i would presume it all depends on the depth of your pockets! Exhaust technology isn't straightforward and the length of the primaries is critical especially on a n/a engine so it would need to be the right place of course.
There are plenty of custom places Primary designs, Hayward & Scott are 2 off the top of my head.


I would love a full system but will settle for a meatier note from a backbox or cat back. In all honesty unless its a racer where any breathing/performance gains mean anything the cost would far outweigh any gains. You could de-cat it or run a sports cat where there will be small gains but again it will almost certainly fail an mot and the latter is £££'s.