JB4 Billet Aluminum Enclosure

Rugged, Fortified JB4 Protection

Our most protective case in the JB4 line-up. The sleek, stylish JB4 billet aluminum enclosure withstands drops, shocks and bumps while protecting electronics from dirt and water. CNC machined with a rubber sealing ring. Ideal for all-weather F and G chassis BMW and other JB4 applications. Compatible with all BMS JB4 & Stage 1 tuners. Made in USA.

Note we also offer scratched enclosures at a discounted price. Scratched enclosures may have some mild scratches and scrapes from installation or rubbing against other enclosures in the box but still look great and function like new!

Version 2 case bolts are M3x.5 and use a 2.5mm Allen wrench. 
Version 1 case bolts are 6-32 x 5/8″ and use 7/64″ Allen wrench.

Compatible with all JB4 & BMS Stage 1 tuners.