ATM Innovation XRB-650E85 XRB Series 650 CFM E85 Carburetor

XRB Series

E85

ATM Innovation’s XRB is a step up from its XRC series. While it shares many of the same features with the XRC, the XRB is intended for racers that frequently take apart their carburetors for precise tuning changes – the billet metering blocks add another level of durability over die cast components. The billet throttle bodies are stronger and more precise too. Plus there is more detail work like “slabbed” throttle shafts that promote smoother flow and less turbulence.

ATM’s XRB carbs use the ATM™ die cast aluminum carb body that has a fully contoured high-flow air horn and externally changeable idle- and high-speed air bleeds. When combined with ATM’s 2-circuit, 4-emulsion billet metering blocks with 4-corner idle adjustment, the XRB becomes one of the most “tuneable” race carbs on the market. These billet metering blocks also have changeable idle fuel and power valve channel restrictions. 

Dynamic fuel handling is important in hard-leaving racecars and ATM’s™ all alumium dual inlet, dual sight-window fuel bowls were designed exactly for this purpose. They are fitted with the 7/8”-20 AN #6 fittings for leak-resistant connections.

All XRB Series carbs are available for gas, methanol and E85 fuels. E85 XRBs come with a gold corrosion-resistant finish and black anodized billet metering blocks and billet throttle bodies.

• ATM™ die cast aluminum main body w/changeable idle- and high-speed air bleeds
• Billet 2-circuit, 4-emulsion metering blocks
• 4-corner idle adjustment
• ATM™ all aluminum dual inlet/dual sight-window fuel bowls
• Billet throttle body w/slabbed throttle shafts
• Available for gas, methanol & E85