Bonbo Universal Optima Battery Tray Kit — Fits Group 34/34/78 (Red/Yellow/Blue Top), Aluminum Hold-Down

Bonbo Universal Battery Tray Kit is an aluminum and iron hold-down system designed to securely mount Optima-style top-post batteries (34, 34/78, D34 and 34M variants) in trunks or engine bays.

This kit combines a rigid base plate, top clamp plate and heavy-duty 3/8" hardware so you can relocate or firmly anchor a racing-style battery. Built from corrosion-resistant aluminum alloy with iron components, the tray accommodates common Optima sizes and includes threaded sleeves and nuts to fasten the assembly without welding or custom fabrication.

Will this tray fit my Optima red, yellow or blue top battery?

Yes — the Bonbo tray is sized for the common Optima top-post group 34 family. The base plate and included hardware are arranged to secure typical Red Top 34/34R/34/78, Yellow Top D34/D34/78 and Blue Top 34M/D34M batteries without extra adapters.

• Base plate dimensions: 11.25" long × 8.5" wide.
• Supported battery envelope: up to 10.5" L × 6.95" W × 6.7" H with supplied sleeves.
• For batteries taller than 7.4", longer 3/8-16 all-thread rods are required (not included).

How does the kit secure a battery for racing or relocation projects?

The kit uses a flat base plate to support the battery, a top clamp plate to lock the battery down, and three all-thread rods that pass through thread sleeves for even pressure. This design prevents movement under acceleration, cornering, or road vibration without permanent modifications to the vehicle.

• Three all-thread hold-downs distribute clamp force across the battery.
• Thread sleeves protect the battery case and provide consistent clamping height.
• Matching nuts included for straightforward assembly and adjustment.

What materials and durability features should I expect?

Bonbo chose aluminum alloy for the base and top to minimize weight and resist corrosion, paired with iron hardware where added strength is needed. The combination offers a balance of lightness and toughness suitable for street and motorsport environments.

• Aluminum alloy plates reduce rust and lower weight compared with steel-only trays.
• Iron components add tensile strength where hardware stress is highest.
• Wear-resistant surfaces and corrosion protection extend service life outdoors.

What comes in the box and are installation tools included?

The package contains all the core mounting components so you can install the tray with common hand tools; it does not include specialty tools or vehicle-specific brackets. The hardware set is sized for the tray; if your battery height exceeds the included sleeve capacity you will need longer all-thread rods.

• Included: 1 base plate, 1 top plate, 3 all-thread hold-downs, 3 thread sleeves, 6 matching nuts.
• Tools required: basic wrenches or sockets for 3/8-16 hardware; optional rust inhibitor for mounting surfaces.
• Not included: longer all-thread for batteries taller than 7.4" and vehicle-specific mounting bolts or brackets.

Who this is for: this Bonbo tray kit suits car owners, track-day racers, restorers and DIY mechanics who need a reliable, non-permanent battery mounting solution for Optima group 34-style batteries. It’s ideal for trunk relocation, roll-cage installations, and anyone who wants a corrosion-resistant, lightweight tray that secures batteries firmly without welding or custom fabrication. If you require a different battery footprint or factory-style hold-downs, double-check the dimensions above before ordering.