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Mishimoto Mishimoto 1.1 Bar Rated 99-15 Ford F-250/F-350/F-450/F-550 Super Duty Overflow Reservoir Cap
Mishimoto Mishimoto 1.1 Bar Rated 99-15 Ford F-250/F-350/F-450/F-550 Super Duty Overflow Reservoir Cap
Mishimoto Mishimoto 1.1 Bar Rated 99-15 Ford F-250/F-350/F-450/F-550 Super Duty Overflow Reservoir Cap
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Mishimoto 1.1 Bar Rated 99-15 Ford F-250/F-350/F-450/F-550 Super Duty Overflow Reservoir Cap

Mishimoto
MISMMRC-11-FRD
748354021479
Radiator Caps
20+ Units In Stock - Ships Next Business Day
$ 18.00 $ 15.95
$ 15.95

SKU: MMRC-11-FRD | UPC: 748354021479

Mishimoto 1.1 Bar Rated 99-15 Ford F-250/F-350/F-450/F-550 Super Duty Overflow Reservoir Cap

This Mishimoto overflow reservoir cap delivers 1.1 bar pressure rating for Ford Super Duty trucks from 1999 to 2015 including F-250 F-350 F-450 and F-550 models. It replaces factory caps that fail under high heat and pressure reducing coolant boiling point. Engineered to lock in coolant circulation this cap ensures reliable cooling during demanding drives.

Key Features

  • 1.1 Bar Pressure Rating: Rated at 16 PSI to increase coolant boiling point by up to 5 degrees F over stock caps preventing boil-over in high-performance or towing scenarios
  • All-Metal Brass Construction: Corrosion-resistant brass body with premium silicone seal withstands extreme temperatures and pressure for extended service life
  • Anodized Aluminum Sleeve: Black anodized finish resists wear with laser-etched Mishimoto logo for precise identification and style
  • OEM Direct Fitment: Matches factory neck dimensions of 1.38 inch inlet and 0.91 inch outlet for seamless installation on Modular 4.6L 5.4L engines
  • Lifetime Warranty: Backed by Mishimoto lifetime warranty covering defects in materials and workmanship

Product Notes

  • Direct replacement for OEM overflow reservoir cap no modifications required
  • Inspect seal annually for optimal performance
  • Ships in protective packaging weighs 0.3 lbs with box dimensions 4 x 3 x 2 inches

Installation Notes

  • Professional installation recommended.
  • Twist off stock cap and replace with Mishimoto cap hand-tighten until secure
  • Compatible with all factory hardware no additional parts needed

This Part Fits

Year Make Model Submodel
1999-2016 Ford F-250 Super Duty XL
1999-2016 Ford F-250 Super Duty XLT
1999-2016 Ford F-250 Super Duty Lariat
2004-2016 Ford F-250 Super Duty King Ranch
2013-2016 Ford F-250 Super Duty Platinum
1999-2016 Ford F-350 Super Duty XL
1999-2016 Ford F-350 Super Duty XLT
1999-2016 Ford F-350 Super Duty Lariat
2003-2016 Ford F-350 Super Duty King Ranch
2013-2016 Ford F-350 Super Duty Platinum
1999-2015 Ford F-450 Super Duty XL
1999-2015 Ford F-450 Super Duty XLT
1999-2015 Ford F-450 Super Duty Lariat
2013-2015 Ford F-450 Super Duty Platinum
1999-2015 Ford F-550 Super Duty XL
1999-2015 Ford F-550 Super Duty XLT
1999-2015 Ford F-550 Super Duty Lariat
1999-2019,2021 Ford E-350 Super Duty Base
1999-2014 Ford E-350 Super Duty XL
2006-2014 Ford E-350 Super Duty XLT

Why Choose Mishimoto?

  • Proven track record in performance cooling for motorsports and street applications
  • Manufactured with precision CNC machining for exact fit and reliability
  • Tested on dyno and track to handle high-heat conditions

Frequently Asked Questions

  • Q: Does this cap fit 1999-2015 Ford F-250 Super Duty with 6.8L V10?
    A: Yes it fits all 99-15 F-250/F-350/F-450/F-550 Super Duty models including gas V8 V10 and diesel variants with compatible overflow reservoir
  • Q: What material is the cap made from?
    A: Brass cap with silicone gasket and black anodized billet aluminum cover for durability and heat resistance
  • Q: What is the warranty and installation time?
    A: Lifetime warranty against defects installs in under 5 minutes as direct OEM replacement no tools required

Shipping & Handling

  • Method: UPS Ground or USPS Priority
  • Availability: In stock - ships same or next business day
  • Packaging: Secure foam-padded box 4 x 3 x 2 inches
  • Weight: 0.3 lbs
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