Talk Morgan Forums Morgan Sports Cars Classic Morgans (pre-CX) +8 breathes more easily

I wanted to help my lovely V8 breathe and the original air filter box wasn’t doing it for me. I fitted a K&N inside the box but there is little room for the air to flow so I wanted a proper open K&N arrangement.

Here is what I fabricated from a used air filter canister off eBay - not wanting to butcher my original part so I can put it all back together as original if I should want to. I cut away most of the air box but have kept part of the bottom to retain the outboard mountings. This gives extra stability by using all four original rubber mounting points. Then had a 88.9mm (3 ½”) OD pipe 1.5mm wall thickness & cut to 30mm long welded on for the K&N RG-1001 to fit.

I did not have to lift the bonnet off to remove the original filter canister which pulls up at the inboard end and pulls inwards to come off the outboard pins. A bit tight so be carful.

So what is the gain? Well, maybe a few horse power? It certainly looks much better when opening the bonnet and the intake howl when I open her up is wonderful – just like on my motorcycles which also run K&N open filters.


Images removed at request of OP