Air and Fuel Performance Packages

STM Tuned

Small Battery Kit

$175.00

SKU: STM-BATK-3S

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The STM Small Battery Kit is a lightweight battery solution designed for the 3000GT and Stealth. It allows for a 20-pound weight reduction compared to the factory battery, helping to shift weight towards the rear of the car and clean up the engine bay. The kit includes a machined billet aluminum tray with stainless hardware that mounts using existing chassis points for an easy installation.
Show original supplier description
The STM lightweight small battery kit is engineered for the 3000GT and Stealth, offering a significant weight savings of 20 pounds over the stock battery. This reduction not only lightens the front of the vehicle, aiding in weight transfer to the rear, but also contributes to a cleaner engine bay appearance. The STM tray is precision-machined from billet aluminum and features tig-welded construction with stainless hardware, proudly made in the USA. It utilizes existing mounting points for a straightforward installation. The battery tray is offered as a standalone component or as a kit including an Odyssey PC680 battery and terminals. For optimal performance and longevity, it is crucial to torque small battery posts to 50 inch-pounds; over-torquing can cause damage. It will not support aftermarket stereo systems and performs poorly in cold temperatures. STM explicitly states they do not warranty the batteries themselves, as they are used in ways not intended by the manufacturer. However, STM provides a Lifetime Guarantee on the battery tray. The typical lifespan of the battery can range from one to ten years, and it should be treated as a maintenance item. For typical street cars with 300-600 HP, it can sit for a week and function for weekend use or daily driving in moderate temperatures (40-90°F). If stored for over two weeks or in freezing temperatures, using a battery charger is recommended. While the batteries will start the car with a functioning alternator, ignition issues can deplete the battery quickly, providing only 10-15 starting attempts. For cars stored in cold conditions for extended periods, pre-charging is essential. The kit includes the STM Battery Tray, Post Braces, stainless hardware, and mounting bolts.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandSTM Tuned
Part NumberSTM-BATK-3S
CategoryAir and Fuel

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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