Ignitions and Electrical› Ignition Components

Autolite

Autolite Double Platinum Spark Plug

$54.78

SKU: APP5684

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
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Easy — 1–2 hours

Overview

The Autolite Double Platinum APP5684 is a spark plug engineered for enhanced durability and performance, especially in distributor-less ignition system (DIS) engines. It features a platinum-to-platinum design that minimizes gap erosion and reduces misfires, leading to a longer service life than copper or standard platinum plugs. The yttrium-enhanced ground electrode improves heat transfer for greater durability under high temperatures and pressure.

This spark plug has a high alumina ceramic insulator for optimal thermal conductivity and dielectric strength, with multi-ribs to prevent flash-over. It includes a mid-projection center electrode and a flat seat type for reliable performance in demanding conditions. Both the center and ground electrode tips are made of platinum for consistent ignition and durability.
Show original supplier description
The Autolite Double Platinum APP5684 spark plug is designed to provide enhanced durability and performance, particularly for distributor-less ignition system (DIS) engines. Its platinum-to-platinum construction significantly reduces gap erosion, which extends the plug's service life beyond that of traditional copper and standard platinum plugs. This design also helps to minimize misfires, contributing to smoother engine operation. The inclusion of a yttrium-enhanced ground electrode plays a crucial role in optimizing heat transfer, ensuring greater durability even under extreme temperatures and pressures. Further enhancing its performance, the APP5684 features a high alumina ceramic insulator. This material offers superior thermal conductivity and dielectric strength, critical for efficient ignition. The multi-rib insulator design prevents flash-over, ensuring consistent performance across various operating conditions. With a mid-projection center electrode and a flat seat type, this spark plug is built to withstand demanding engine environments. Constructed with platinum tips on both the center and ground electrodes, the Autolite APP5684 ensures reliable ignition and long-lasting durability. This performance-grade spark plug is an excellent choice for drivers seeking dependable and efficient ignition solutions for their vehicles.

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

BrandAutolite
Part NumberAPP5684
CategoryIgnitions and Electrical

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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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