Sale

Metco Motorsports

Cobra 5-Piece Idler Kit

$549.99 $449.99 Save $100.00

SKU: MCI-KIT

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The Metco Motorsports Cobra 5-Piece Idler Kit offers a comprehensive solution for upgrading the idler pulley system on your 2003-2004 Mustang Cobra, particularly for supercharged applications. The standard kit configuration features three 100mm idler pulleys and one 90mm idler pulley. The 90mm pulley is designed for the OEM center engine location to ensure proper belt clearance around the supercharger pulley. The 100mm pulleys are strategically placed on the auxiliary idler bracket, the driver's side of the engine, and the crank idler position to maximize belt wrap, reduce bearing speed, and enhance overall system efficiency. This idler pulley kit is available with either single-bearing or double-bearing pulleys. The single-bearing options offer a durable upgrade over OEM pulleys, featuring precision-machined billet construction, high-load, high-speed bearings, and hard-coat anodizing. For severe-duty or high-load applications, the double-bearing pulleys incorporate two heavy-duty bearings within the pulley bore to distribute side load more effectively, making them suitable for installations converted to a 10-rib drive belt. The double-bearing idler pulleys are 1.75" wide at the belt surface. When used with the Cobra's stock-style 8-rib belt, there will be approximately .25" of unused belt surface on the pulley; this is for informational purposes and does not affect fitment. The kit is also compatible with Whipple 3.0 Superchargers as of March 2025.

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

BrandMetco Motorsports
Part NumberMCI-KIT
CategoryEngines and Components
5,000+ Trusted brands
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(760) 282-4645 hello@motormia.co

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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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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