BLACK FRIDAY & CYBER MONDAY IS HERE

20%

OFF

Receive 20% off when purchasing a Grand Rock Duplex Kit with top stacks. Offer valid Friday 11/24/23 through 11/27/23.

Duplex kits available in 7 and 8 inch and now in our new 6 inch version!

Use code: CYBMDY-20

Duplex Kits fit 2002 Peterbilt 359 & 379 Daycab/Unibuilt applications along with 2003 and newer Daycab/Unibuilt 379 & 389 Glider models.

2002 - Older Applications

6" kit - 6PK-9052OSRF

7" kit - 7PK-9052OSRF

8" kit - 8PK-9052OSRF

2003 - Newer Applications

6" kit - 6PK-9055OSRF

7" kit - 7PK-9055OSRF

8" kit - 8PK-9055OSRF