SKU: JB-500
JB-500 BLOCK OFF PLUGS For 5" Big & Ugly BAU Butterfly Block Off

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 and sealer.  

5 minute job if the injector is not on the blower. 

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.

JB-BAU-Filters   are the air filters 

Also available in 3-11/16", 4-3/8" (BAU3), and 5-9/16" (BAU1)

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