The amount of work involved for the little heat displacement ‘finning’ up a plenum vs the work involved in adding an intercooler....
...I guess every little helps, i noticed a bit of a difference fitting a decent pipe and a set of 36s to my 1216....15-20 bhp added onto the 120 bhp Ish
when I added the intercooler to the 1216 turbo I didn’t notice any difference as it was far too powerful for me anyway....once over 200 bhp on a road is just silly....so fin it, wrap it in gold leaf, add a mini water cooling jacket, water meth injection.....silly is as silly does.