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Product Information

This is the Roush FEAD serpentine belt: a six-rib belt cut to 2,085 millimeters. [VERIFY: our coverage data lists the 2011-2014 Ford F-150 (3.5 EcoBoost, 5.0, 6.2 V8, Raptor, V6) and 2011-2014 Ford Mustang (GT, GT500, V6, 2012-2013 Boss 302), but Roush's own listing for this belt names different, supercharged-only applications. Confirm your exact accessory drive configuration before you order.]

Why Upgrade to This Roush FEAD Belt

Per Roush, here's what this belt is built to:

  • Cut to Roush's specified 2,085 millimeter length, not an approximate size.
  • Six-rib (6K) belt, per Roush's spec for this part number. [VERIFY: whether that rib count matches your specific accessory drive; see the fitment conflict flagged below.]
  • Carries Roush's own part number (421626), so you're ordering the exact FEAD belt instead of matching length and rib count off a generic parts counter chart.

Fitment Notes

Covers the 2011-2014 Ford F-150 in 3.5 EcoBoost, 5.0, 6.2 V8, Raptor, and V6 configurations, and the 2011-2014 Ford Mustang GT, GT500, V6, and 2012-2013 Boss 302. [VERIFY: Roush's own listing for this belt names different applications: the 2011-2014 F-150 5.0L P2 supercharged, the 2015 F-150 5.0L supercharged, and the 2011-2014 TVS-equipped Mustang. None of those line up cleanly with the naturally aspirated engines above, so confirm which accessory drive configuration this belt actually matches before you order.]

Install and Honest Talk

Roush's own listing only gives length and rib count, nothing about the swap itself. [VERIFY: install steps, whether a tensioner tool is needed, and whether other parts have to come off to reach the belt.] Worth weighing before you order: Roush's fitment text for this belt names supercharged applications (P2 SC F-150, TVS Mustang), a different accessory drive layout than a naturally aspirated engine runs. A belt that's the wrong length or rib count for your actual drive won't seat right, so match your engine's exact accessory drive configuration, not just the year and model, before you buy. What else you need: check your service manual or Roush's included instructions for whether a tensioner tool is required for this swap.

Specs

  • Brand: Roush
  • Part number: 421626
  • Quantity: [VERIFY: quantity not stated by Roush]
  • Part type: [VERIFY: our catalogue files this as Belts - Timing, Accessory, but the title describes a FEAD serpentine (accessory drive) belt, not a timing belt. Confirm the correct classification.]
  • Length: 2,085 millimeters
  • Rib count: 6-rib (6K)
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