Velocity stack inside stock airbox?

[waxhead]

I have a brand new westcoast air filter like that

 

[Quinc]

Just need to run the rrp hood scoop!

 

[mybad]

Superbike manufacturers have been using stacks inside airboxs for years. My BMW has a link that raises the entire stack as rpms increase. Would love to see someone try that and report back with results.

 

[joeschuit]

Moved on to oem 44s, so made a similar bell insert for those as well. Not planning on going back to 38's on my new-to-me 771 so I might find someone who can use them.

 

[waxhead]

Damn that looks pretty cool

 

[MTRHEAD]

Just made a run of monster stacks! Fits all 50mm+ carbs