Superchargers
2005-2010 Roush Mustang Belt Tensioner, Heavy Duty 4.6L 3V
Roush part # 404225
$149.99
Roush retail price · part only
Installed at our shop
est. $374.99
Part $149.99 + about 1.5 hrs labor at $150/hr ($225.00).
Estimate only — shop supplies and sales tax not included. We confirm the final installed price for your exact vehicle before any work.
Fits: 2005–2010 Mustang
MustangInstalled at our East Bridgewater shop, or shipped anywhere in the US. Prefer to talk? 508-715-3554
- Genuine ROUSH Performance part, from an authorized Gold Dealer
- Installed by Ford specialists at our East Bridgewater shop
- Roush retail price. Installed price estimated up front, confirmed before work
Prices and availability subject to change. Prices updated October 2, 2026.
Details & specs
This Mustang belt tensioner is the same belt tensioner that's included in the 2010 Roushcharger kits, making it a replacement part for these packages:
- 2010 Mustang R2300 Roushcharger and trade Kit (part #420026)
- 2010 Mustang R2300 Roushcharger Upgrade Kit (part #420027)
- 2010 Mustang Chrome Roushcharger (part #420024)
This tensioner is specially designed for heavy duty applications to handle the added rotational forces on the FEAD from supercharging.
This heavy-duty tensioner is an upgrade for all SINGLE BELT TVS R2300 ROUSH superchargers installed on 2005-2009 Mustang GTs.
Product highlights for the Roush Mustang Belt Tensioner, Heavy Duty 4.6L 3V (2005-2010):
- Same belt tensioner included in the 2010 Roushcharger® kits
- Heavy duty construction for handling extreme rotational forces on the FEAD from supercharging
- Upgrade kit for all SINGLE BELT TVS R2300 Roush superchargers for 2005-2009 Mustang GTs
