Protect your JB4 or BMS Stage 1 tuner with the right enclosure for your application.

Choose from our premium CNC-machined billet aluminum enclosure for maximum durability, our weatherproof plastic enclosure for F and G chassis applications, or the high-temperature plastic enclosure designed specifically for E chassis BMW models, all engineered to keep your tuner protected from heat, moisture, dirt, and everyday abuse.

JB4 Billet 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 BMS JB4 & Stage1 tuners.


JB4 Plastic All Weather Enclosure
A plastic version of our fully weatherproof JB4 enclosure. To install remove the existing harness amp cover and attach to the JB4 board using the included hardware. The board and harness head then fit inside the new all weather enclosure.

Compatible with all BMS JB4 & Stage1 tuners.

High Temp Plastic Enclosure for E Chassis N54 BMW

All sales for Burger Motorsports and Fuel-It! products are final. These items are not eligible for return or exchange under any circumstances. Please ensure compatibility and fitment before placing your order.