SKU: JB-31116
Block off Plugs for Big & Ugly 3-11/16" BAU Butterfly Block Offs

BAU Block Off Joe-Blo

Block offs for  3-11/16"   BAU  

If you are flowing too much air and want to re balance your system down to suit your engine size  this is for you .

These work great on Mechanical, but for EFI we recommend retro fitting the Progressive linkage .

Our BAU injector blanks are inserted from behind the butterfly and secure with a bolt 

Installs quickly.

For engines not requiring so much air flow, blanking off 1 or 2 butterflies and using a filter in the operating butterfly, helps throttle control.

You can use as many as you wish.

When the butterflies are closed they are not visible.

Also available in 4-3/8" (BAU3), 5" and 5-9/16" (BAU2 and BAU1)

https://www.permatex.com/products/gasketing/gasket-sealants/permatex-permashield-fuel-resistant-gasket-dressing-flange-sealant/