MMR / IWIS XHD (EXTREME HEAVY DUTY) Secondary Chains for 1993-2014 DOHC (ALL) Including GT500. for 4.6 / 5.4 DOHC Ford Modular)

Prevent the common secondary chain failure that leads to catastrophic engine failure. Larger cams and aftermarket valve springs place increased loads on the factory chains that they were simply not designed to handle. Protect your investment with this Precision chain kit. Compatible with all factory and aftermarket tensioners, guides and sprockets. Improved materials, quality, strength and finish over factory chain.

These chains have been tested to 10,000rpm and over 3000HP by Team MMR and have run 5.95 @ 242 MPH in the 1/4 mile!! They are simply the finest chains you can purchase.

Comparison in picture shows the factory & competitors chain size vs MMR XHD chain. MMR XHD chains features larger axle, larger bushing and larger side plates!

Includes QTY 2 Secondary Heavy Duty Chains

No returns on Performance Items. See our 100% positive feedback and purchase with confidence!

Fits:

93-2004 4.6 DOHC / Cobra / Mach One / Aviator

2007-2014 Shelby GT500

1999-2004 Lincoln Navigator

ALL Australian 5.4 DOHC Models