Sorry mate, I missed this post. The main problem is heat soak, there's a thread on here somewhere that discusses the whole thing. With the K & N box I was seeing really high air intake temperatures (low is good) and the box needed modification to avoid rubbing against wiring loom, I think others had to mod too. In the end I removed the K & N box, modified the K & N upper pipe and refitted the standard airbox with rt biscuits velocity stack mod, I also kept the K & N scoop and lower pipe. Now the air intake temp is considerably improved, better hp was achieved also at remap.
In the end it's noise versus hp, oh and looks too
Why ?
was thinking of getting one