The all-new XR Series World's Best belt was developed specifically for race applications where the tendency is to land on the throttle. 
Designed with larger Kevlar cord and a custom braid design for better shock absorption.
Made from custom blend of two premium High Modulus Compounds holding the top and bottom layers together like super glue.
Load tested to withstand the power of 600HP machines. 
Impregnated with short Aramid Fibers for better heat resistance and belt-to-sheave adhesion.

Don’t let a broken belt ruin race day!
Don’t let a broken belt ruin race day!
The Bad Ass XR Series World’s Best Drive Belt was developed and extensively tested for extreme race conditions in both desert and drag race applications. Manufactured with a larger Kevlar cord and featuring a custom braid design marrying the layers of the belt for better shock absorption and increased cord pop-out resistance, these are the best performing and strongest belts you can run in race situations. The custom blend of two premium High Modulus Compounds hold the top and bottom layers together like super glue for superior quality. These belts are load tested to withstand the power of up to 600hp machines and are also impregnated with short Aramid Fibers for better heat resistance and belt-to-sheave adhesion. Leave the competitors in the dust with the EVP XR Series Belts!
Race Proven Performance
Manufacturing, quality control certifications: ISO-14001, ISO-9001, and IATF-16949
3rd Generation heavy-duty, high-twist Aramid Fiber cord for HIGH HORSEPOWER TENSILE LOAD requirements
Highest shock load rating to date being able to withstand the power of up to 600HP machines
Increased top cog pressure load design that increases sidewall rigidity, prevents top cog bowing, but still allows for increased rotational flexibility.
Bottom Cog uses HIGH MODULOUS RUBBER COMPOUND (BZX1) for better heat resistance and heat dissipation
Bottom cog is impregnated with short Aramid Fibers for better belt-to-sheave adhesion and reduced overall belt temperature
Latest bottom cog design for greater rotational efficiency at full shift
Precision ground sidewall angle (SCUFFING) for smooth engagement, increased power transfer and lower operating belt temperature
Aramid Fiber Cord (vs Polyester) wraps over bottom cogs for increased bottom cog strength and increased cord pop-out resistance
This belt acts like the OEM belt in terms of engagement and operating RPM’s.